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Archive for August, 2010

LED Down Light vs. Incandescent

31 Aug

After Edison invented incandescent bulbs, human beings have entered electric age, and until now, the incandescent bulbs are still widely used all over the world. However, human beings are facing serious problems caused by incandescent bulbs, energy wasting and greenhouse gas emission. Everyone knows that incandescent bulbs have very low efficacy since just a small fraction of electricity is converted to light while other electricity is converted to heat and dispersed to the air. Meanwhile incandescent bulbs also emit thousand of tons of CO2 to the environment every year, which causes world wide climate warming. Then can any new type of lighting replace incandescent bulbs and solve these problems? LED lighting can be right solution which is not only energy efficient, but also eco-friendly. LED lighting is the next generation of lighting solution, which just has a history of several decades. LED lighting is a green lighting solution with high energy efficiency due to high efficacy of LEDs, and LED lights are made with eco-friendly materials which do not contain any toxic materials.

Among all kinds of LED lights, LED down light is the most ideal replacement for incandescent bulbs. First of all, LED down light only consumes only 20% energy to deliver the same light intensity as incandescent bulb, which means LED down light can save 80% energy bills compared with incandescent bulb. LEDs for interior lighting can reach typical efficacy of 100 lumen per watt, but incandescent only has efficacy of around 10 lumen per watt, which means most energy that LEDs consumes is converted to light and most energy which incandescent consumes is converted to heat.

Secondly, LED down light has much longer lifetime than incandescent bulb. LED down light can last over 50,000 hours, which is ten times longer than the lifetime of incandescent bulbs. Moreover, LED down light can save your maintenance costs during its lifetime.

Thirdly, the light quality of LED down light is much better than that of incandescent bulbs. The light that incandescent bulbs emit can be very sharp with hot spot, which may cause eyestrain and hurt your eyes. LED down light emits comfortable light which is very bright and even. Meanwhile LED down light can be designed as dimmable model as per your requirements.

Fourthly, LED down light is more eco-friendly than incandescent bulb. Incandescent bulbs contain toxic materials and emit much heat and carbon dioxide to the environment. LED down light are made with recyclable materials which are not toxic, and LED down lights emit much less greenhouse gas than incandescent bulbs.

In a word, LED down light is the best option for you to replace incandescent bulbs. If you want to reduce your energy bills and keep your family healthy, do not hesitate, replace your inefficient incandescent bulbs with LED down lights immediately and you will get amazing experience.

 

LED Lighting vs. Fluorescent

31 Aug

LED lighting is the next generation lighting technology which features many benefits such as higher energy efficiency, lower power consumption, lower maintenance costs, longer lifetime, durability and brighter light output than conventional fluorescent lighting. Fluorescent lighting contains toxic materials such as mercury which is harmful to environment and human body. Although fluorescent lighting is more energy efficient than incandescent lighting, it is still an energy wasting monster when compared with LED lighting. However, fluorescent lighting accounts for a high percentage in existing lighting all over the world, switching from fluorescent lighting into LED lighting can greatly reduce the global lighting power consumption and greenhouse gas emissions. Now let’s do some detailed analysis to compare LED lighting and fluorescent lighting, and there is no doubt that LED lighting will defeat fluorescent lighting.

First of all, LED lighting is more energy efficient than fluorescent lighting due to the high efficacy of LEDs. LEDs for interior lighting have already broken the efficacy record of 100 lumen per watt, while fluorescent lighting only has an efficacy of around 60 lumen per watt. LED has a power factor of 0.9, which means most of the power is converted into light, but when fluorescent lighting works, a huge amount of power is converted into heat which will be dispersed finally. LED lighting consumes only 30% energy as fluorescent lighting to deliver the same lumen output.

Secondly, LED lighting has a much longer lifetime than fluorescent lighting since LED lighting is solid state lighting which more stable and reliable. LEDs can last over 50,000 hours which means 17 years under normal use. Whereas fluorescent lighting only has a lifetime of around 5,000 hours, which means you have to replace them as often. Using LED lighting can greatly save your expenses which are used to buy new light bulbs and pay for the labor.

In addition, the light quality of LED lighting is much better than that of fluorescent lighting. Fluorescent lighting is always flickering when start up, while LED lighting is quick to start up without any flickering. When working for long time, fluorescent lighting may have some hot spots due to heat it generates, which does not happen to LED lighting. Fluorescent lighting can cause eyestrain, but LED lighting does not as a result of its uniform and comfortable light output. LED lighting is more eco-friendly than fluorescent lighting. Fluorescent lighting contains toxic materials such as mercury which can cause air pollution and do harm to human body, in contrast, LED lighting is solid state lighting which does not contain any hazardous materials. Someone may say that the upfront costs of LED lighting is too high, it is true. However, during a long term, the payback of LED lighting is far more than just upfront costs, the energy bills and maintenance costs it saves could be several times as the upfront costs. In a word, LED lighting can replace fluorescent lighting since it meets the requirements of sustainable development.

 

Lighting Controls Offer A Reasonable First Step Toward Improving Energy Efficiency

27 Aug

Evaluation of thirteen of the leading lighting control vendors for commercial offices indicates that solutions can reduce electricity consumption by 35-55%, however payback can range from 2-10 years say David Raezer and Romahlo Wilson.
Lighting comprises 20% of commercial buildings’ overall energy expense and 38% of their electricity expense. Accordingly, effective management of lighting infrastructure is critical to any energy efficiency strategy. In our opinion, the two most impactful, technology-grounded strategies for reducing electricity consumption associated with lighting include:

* Lighting control solutions (see CTA’s Report on “Lighting Controls”); and
* Next generation lighting technologies, such as LEDs (see CTA’s Report on “LED Benchmarking”).

While both are critical to long-term efficiency improvements, Cleantech Approach (CTA) recommends lighting control solutions as a good “first step” toward reducing energy consumption, given that they carry lower technology risk and up-front costs than next-generation lighting technologies. They also enable users to capture immediate energy savings in anticipation of further technological improvements and price declines in next-generation lighting solutions. Furthermore, these solutions should be fully interchangeable with existing bulbs in today’s lighting control systems.

Lighting control solutions enable businesses to reduce electricity consumption costs associated with their lighting infrastructure. With these solutions, businesses can easily control the behavior of their lighting assets (i.e., when lights turn on/off or how/when lights dim) to eliminate wasted light and excess electricity consumption and precisely meet the requirements of employees functioning within a given environment.

We believe that there are two critical elements that potential purchasers of lighting control solutions should consider: the potential payback of these solutions; and each vendor’s unique technological approach. CTA’s recent report offers a high-level framework for understanding and evaluating these considerations.

Understanding the payback on your investment

The first critical factor that should be considered as part of potential investment in a lighting control solution is a thoughtful examination of your building’s/space’s energy use profile. Given the age of and general technology employed in today’s commercial office infrastructure it is highly likely that there are considerable opportunities to reduce your energy use through simple strategies such as daylighting, occupancy control, and scheduling (see descriptions of strategies below). This examination will yield a general cost basis from which payback (the time required to recoup the initial cost of a solution from resulting savings) can be calculated. It should be noted that payback is only a partial return on investment analysis for these solutions as some real estate owners and investors have sought to and successfully capitalized on “greener” assets through higher property values.

Accordingly, CTA used a proprietary approach to examine the cost of lighting control solutions, determine the range of potential cost saving opportunities, and calculate the resulting payback periods associated with the adoption of lighting control technology:

* Cost of the solution: Comprehensive lighting control solutions for commercial spaces, employing the full suite of potential energy consumption reduction strategies, typically cost $1.00-2.50 per square foot installed. Given the regional nature of incentives (i.e., overlapping federal, state, and local tax credits; and lower insurance costs that are sometimes offered to more energy efficient assets) we did not include them as a potential price reduction to solutions.
* Electricity consumption reduction potential: These solutions reduce electricity consumption expenses associated with running lighting networks by 35-55% (in situations where next generation, ultra-high efficiency technologies have not been deployed); our analysis that lays out the assumptions underlying this range of potential reductions is available in the complete report. It should be noted that we assume a constant price per kilowatt hour of $0.12 in our report. At CTA, we aim to provide a general framework that readers can adopt to their unique situations and believe that customers are in the best position to deduce any cost inflation or deflation in their electricity prices, including potentially large increases from clean energy legislation.
* Payback period: Assuming electricity savings only, paybacks on the initial investment in lighting control solutions range generally from 2.7 years (implying 55% electricity savings with a solution that costs $1.00 per sq. ft. installed) to 10.7 years (implying 35% electricity savings with a solution that costs $2.50 per sq. ft. installed).

Lighting controls
This 35-55% electricity savings range was achieved through the use of five strategies employed by best-of-breed lighting control solutions; all of these strategies would need to be used in order to achieve the savings and resulting payback that we lay out in the exhibit above.

* Lumen maintenance: Lumen depreciation is the loss of light output as a fluorescent lamp ages. A lumen maintenance strategy addresses this problem by reducing power in response to higher initial lamp lumens, while increasing power as lamps age and phosphors degrade to maintain appropriate light levels.
* Daylighting: Daylighting allows the lighting control solution to adjust lighting levels according to the availability of natural light during the course of the day: the more natural light enters the office space, the less the lighting infrastructure needs to deliver.
* Task Tuning: Task tuning allows the solution to control lighting according to specific task and working environments, optimizing light output where it is needed.
* Occupancy Control: With this strategy, lights are turned off when the solution detects (with occupancy sensors) that there are no longer occupants in a particular room or area. As building occupants move from location to location, the solution dynamically responds to user-traffic patterns, providing light only when and where it is needed.
* Scheduling: A time scheduling strategy enables lights to be turned on/off at appropriate, predetermined times and locations during workdays, evenings, and weekends.

Understanding each vendor’s unique approach

In addition to understanding the overall value proposition of these vendors, we believe it is important to appreciate how each vendor approaches providing a solution from a technology standpoint. Why is this important? Certain solutions are optimized for certain environments; you want to be sure that you select a solution that it optimized for yours.

Lighting control solutions vendors range from large multinational companies to relatively new startup players with innovative technology. In our detailed report (which we are making available to LED Magazine readers), we have included detailed profiles of key lighting control solutions vendors and their respective offerings. Lighting control solutions vendors (associated brands) profiled include: Acuity Brands (Synergy, SensorSwitch, Lighting Control & Design); Adura Technologies; Cooper Controls; Delmatic; Encelium; EnOcean; Leviton Manufacturing; Lumenergi; Lutron; Philips (Dynalite, Lightolier Controls); Schneider Electric; Universal Lighting Technologies; and WattStopper. It should be noted that CTA does not recommend vendors or endorse a particular strategy for lighting controls.

While all of these vendors employ sophisticated, centralized, software-based approaches to administering their solutions, they often differ greatly on the architectural framework through which they deliver lighting control functionality. At the most basic level, the chief differentiators among these solutions derive their respective communication method and control intelligence dispersal.

Communication Method

What we term the “communication method” – wired or wireless – is a fundamental distinction that can be drawn among these solution providers. When we refer to wired versus wireless, we are referring to the connection between elements in the network (lighting fixtures, sensors, and switches) and an aggregation device; the aggregation device collects the control data and brokers communications between these peripheral devices and the central management console, where the lighting network is monitored and control parameters are set.

* Wired connections require control data to be transmitted over low voltage wiring to an aggregation device.
* Wireless connections can be achieved in two manners: (1) control data sent wirelessly (through the air), usually using ZigBee or EnOcean protocols, to an aggregation device; or (2) control data sent over the existing powerline network, with no low voltage control wiring, to an aggregation device.

Lighting controls
Control Intelligence Dispersal

What we term “control intelligence dispersal” refers to how lighting control intelligence (parameters for how the lighting networks is to operate) is dispersed and where it resides.

* Intelligent, ballast-based strategies. In what we term ballast-based strategies, vendors look to leverage intelligence resident in the lighting ballast itself (a ballast is required to control the starting and operating voltages of electrical gas discharge lights, esp. fluorescents). While all strategies can control ballasts, ballast-based strategies distribute intelligence directly to the ballasts where it resides locally; ballasts then execute the parameters set by the centralized software control console.
* Intelligent, node-based strategies. In what we term node-based strategies, vendors install a controller or node that sits inside each fixture (next to the ballast); it is this intelligent node which is responsible for executing all control functionality according to the parameters set by the centralized software control console.
* Intelligent, sensor-based strategies. In intelligent, sensor-based strategies, vendors distribute lighting control intelligence directly from the central management console to intelligent sensors and switches; there is no aggregating, intermediary, intelligent device.
* Control panel-based strategies. In what we term control panel-based strategies, vendors do not supply an intelligent ballast or node. All of the intelligence is administered through control panels typically resident in electrical wiring closets. These control panels are responsible for communicating with all of the devices on the periphery and executing all of the light level parameters set by the centralized software control console.

About the Author
David Raezer and Romahlo Wilson are Partners at Cleantech Approach, an independent research and advisory firm focused on helping municipalities, global development organizations, and private businesses evaluate and devise sustainable, technology-enabled strategies.

 

Silicon-controlled Dimmers Shall Be Banned

26 Aug

Silicon-controlled dimmer is just as bad as incandescent light and leaded gasoline

Lighting consumes nearly 20% of the global electricity every year. Compared to developed countries, lighting energy consumption of developing countries accounts for a higher proportion. Incandescent lights are cheap, but their efficiency is very low. If they are fully replaced by energy saving bulbs or solid state lighting, hundreds of power plants are unnecessary, and each year more than ten million tons of carbon dioxide emissions can be reduced. Now EU has already planned to gradually phase out incandescent lights from 2009 to 2016; United States is also expected to gradually prohibit the use of most incandescent lamps from 2010 to 2014. Although Japan has not passed a similar legislative measures, a leading lighting brand, Toshiba, already fully shut down their incandescent production line in March 2010, ending its 120-year history of manufacturing light bulbs. On the other hand, China is actively building its large-scale LED lighting industry. China, India and Japan banning incandescent lamps will also happen within a few years.

Competition between the two horses: energy saving light bulbs and LED lighting

Once incandescent lamps are phased out, the average home and commercial lighting will present a situation of two heroes competition between energy saving CFL bulbs and LED lighting. LED lighting has surpassed energy saving light bulbs in many functions, therefore, it is considered as the preferred lighting option for 21st century. The advantages of LED lighting include:

1. LED does not contain toxic materials, but the energy saving bulbs have a certain content of mercury.
2. Different from the energy saving bulbs, LED does not emit ultraviolet rays.
3. LED lighting efficiency is equal to energy saving bulbs, but its efficiency has continued to increase, while the prices become cheaper and cheaper.
4. The lifetime of LED light bulbs is as several times as energy saving bulbs. Japan’s Panasonic announced that their LED light bulbs have a lifetime of 19 years.
5. Under the environment of -40 degree Celsius, LED bulbs can still be functioning, but for most energy saving bulbs, it is difficult to start or operate when the temperature is below 10 degree Celsius.

Many industry analysts predict that LED bulbs will fully replace the energy saving light bulbs in 2015. This view is based on the conclusions of competetion between LED and CCFL products at other markets in recent years. They noted that LED backlight has pushed CCFL backlight to the edge of being phased out in applications of cell phones, tablet PCs, notebook computers, so the market experts are confident to predict that LED backlight will replace CCFL backlight in the application of LCD TV and LCD screen. According to this, LED lighting surpassing CFL lighting in five years is a reasonable prediction.

Potential destroyer

Many engineers and companies’ breakthrough achievements in LED lighting technology bring us this lighting revolution, we shall applaud to thank them. However, we are worried that the potential destroyer, silicon-controlled dimmer, will erode, even overthrow the most benefits that LED lighting revolution brought to us.

We know that dimmable lighting can further improve energy saving effects. But among the main three types of dimming LED lighting, the silicon-controlled dimmer seems like a hideous monster, devouring the results we obtained from developing dimmable lighting with our hard working.

Dark side of Silicon-Controlled Dimmer

Dimming mode of silicon-controlled dimmers is cut off part of the Sinusoidal AC current waveform which is provided to bulbs. Thus, silicon-controlled dimming light bulbs have a low power factor which is always lower than 0.5. But please be noted that the power factor is an important indicator about power efficiency and power quality. Perfect power factor is 1.0. Only in phase sine current with harmonic distortion of zero can achieve the power factor of 1.0. In recent years, on the harmonic distortion of current waveforms of many electrical and electronic equipments, EN / IEC 61000-3-2 standards have very strict specifications. In the past, most computer power supplies have a power factor of 0.5 to 0.7. Now EN 61000-3-2 and other government regulations, such as Energy Star of the United States Department of Energy, required that the electrical equipments such as televisions, computers and so on shall reach at least a power factor of 0.9.

Moreover, silicon-controlled dimming LED bulbs shall add some capacitor snubber circuits to avoid light bulb flickering when dimming. But doing so will make the low power factor become even lower, which is often less than 0.10. Meanwhile, the current waveform of power supply line will become a series of surge current. Harmonic distortion of current waveform will be far more than specified limits. According to the author’s over thirty-year experience on electronics industry, no other products can cause such a serious damage to power factor and current waveform like silicon-controlled dimmer.

Figure 1 shows current waveforms of silicon-controlled dimmer when dimming at different dimming positions. We can clearly see the low power factors and severe current surges at different dimming positions.

Figure 1 current waveforms of silicon-controlled dimmer at different dimming positions

Bleeder Resistor

In addition, silicon-controlled dimmer seems to be an energy saving device, actually it is not. Although the silicon-controlled dimmers can reduce power consumption of incandescent lights, it does not mean that these dimmers can also save power when used for silicon-controlled dimming LED bulbs. This is because when dimming, LED light bulb is a small load to the traditional silicon-controlled dimmer. But the load is too small, which will make the silicon-controlled switch devices unstable, leading to serious LED bulb flickering. We all know to fix this flickering problem, we need to add dummy load or bleeder resistor into silicon-controlled LED light bulb. But usually in dimming state, the bleeder resistor must consume 1W to 2W to effectively overcome the flickering problem.

This approach of adopting bleeder resistor revealed the dark side of silicon-controlled dimming LED bulbs, that is, low efficiency and excessive standby power. Please be noted that the Energy Star program in the near future will improve the efficacy of solid-state lighting to 56lm/w. Obviously, the silicon-controlled dimming LED bulbs can not meet the requirements of continuing to improve lighting efficacy. In addition, Energy Star has specified the standby power consumption of most electronic equipments, including telephone, television, computer and so on. Nowadays, standby power consumption of personal computer and television is already less than 1W. The Energy Star’s next goal is to decrease standby power consumption of many small electrical appliances  to 0.3W or less. The total electricity consumption of lighting is much more than other small electrical appliances, specifications to its standby power consumption would be more important.

In addition, the Energy Star program has zero power consumption requirements for solid-state lighting when it is turned off. When dimming deeply, the state of silicon-controlled dimming light shall be  the same as turned-off or standby mode. But in fact, the bleeder resistor wastes more than 1W of power.

Silicon-controlled dimming LED bulbs can not meet Energy Star specifications, whether power factor, lamp efficiency, or turned-off mode power consumption.

As mentioned above, silicon-controlled dimmer has several fundamental flaws which can not be effectively solved. Silicon-controlled dimmer is a monsterall who most seriously violates energy saving and power quality among all electronic equipment. Therefore, the use of silicon-controlled dimming LED bulbs will only help spread its evil consequences to the electricity grid throughout the country.

The nightmare could be like this: a major city installed silicon controlled dimmers to all its commercial and residential lighting. Around midnight, the majority of office buildings, factories, and the families will set the dimmable lighting to deep dark mode. No one notice that these lamps at 120Hz frequency will form surge current simutaneously. Serious current harmonic distortion caused noise, interfering communications network, television, radio, computer and household appliances. Some systems fail, and can not be used. Meanwhile, the current surge has also spread to turbogenerators in the power plants. Generators start to vibrate. Power plants must switch off the turbogenerators before the vibration can not be controlled.

The damage that silicon-controlled dimmer causes to power factor, and the extent that it damages the quality of power supply and wastes standby power is unparalleled.

Silicon-controlled dimmer is a product that is invented in last century. Even if it has already existed for half a century, its natural flaw of destroying power factor can still not be solved. Just like contemporary leaded gasoline, or add a little mercury to the fluorescent lamps, silicon-controlled dimmer gives people an illusion of quickly overcoming the problem. But decades have passed, we must pay a heavy price to our ignorance. Unfortunately, some companies may not understand, there are some other companies ignoring the defects of silicon-controlled dimmers, continuing developing LED lighting products which match with silicon-controlled dimmers.

We call upon the power companies, government regulators, environmental groups and technology organizations can deeply understand the dark side of silicon-controlled dimming lights. We suggest that silicon-controlled dimmers and lamps should be regulated by Energy Star specifications, when in dimming mode, the power factor, efficiency and standby mode power consumption and other aspects shall meet the requirements of various specifications. If it can not meet specification requirements? We hope that competent authorities shall declare early that silicon-controlled dimmer are not applicable for energy-saving lighting applications.

Note: In fact, any electrical or electronic experts can tell you the silicon-controlled dimmer’s inborn defects that they destroy power factor and current wave is unsolvable.

Options to replace silicon-controlled dimmer

So what can replace the silicon-controlled dimmer? Now there are two main alternatives, one is remote control dimmer, the other is the EZ dimming.

Remote control dimmer use infrared or radio waves to transmit control signals, similar to television or air conditioner’s remote control. Their main drawback is high cost. Installing infrared or radio receivers on the ceiling or inside the lamps costs much more than the general non-dimmable lamps. Another drawback that must be overcome is that different brands of remote controls must be compatible. Unfortunately, once involving the development of a common industry standards, the manufacturers all consider their own interests as priority, and it is difficult to achieve consensus.

EZ dimming is a new generation of dimming technology invented by New Green Technology. EZ dimming is the solution with the lowest costs. It integrates all dimming control functions in a dimmable LED driver. And EZ dimming lights can use the original wall switch, no need re-wiring, and no additional hardware facilities are required.

In fact, the normal operation of EZ dimming LED lamp is the same as non-dimmable lights. Switching on the wall switch will brighten all lights, and switching off the wall switch will dim all lights, turn off the switch on the full dark.

If you want to dim the lights in corridors, toilets, office rooms, parking lot at night, or late at night dim the lights in public buildings such as hospitals, schools, train stations and so on, switch the wall switch once (the action from fast turning off to fast turning on), you can dim the light to 60% brightness. The second switch can dim the light to 40% brightness, the third switch can dim the light to 20% brightness, the again switch will dim the light to full brightness.

To directly jump from any dimming position to full brightness, you just let the wall switch stay at turned-off mode for more than 1.5 seconds, then switch on the wall switch, all lights will be dimmed to full brightness. To directly jump from any dimming position to full darkness, just switch the wall switch into off mode.

Figure 2 shows current waveforms of EZ dimming light bulbs at different dimming positions. AC current waveforms are all smooth curves without surge. whichever dimming position it is at, the power factor maintains higher than 0.9.

Figure 2 current waveforms of EZ dimming light bulbs at different dimming positions


Figure 3 operation method of EZ dimming light bulbs

Zero-cost dimming program

In fact for most occasions, we only need to add a simple dimming function to general lighting. That is say the public buildings such as offices, shops, schools, hospitals and so on, usually only fully turn on or turn off; only at night, work, or out of business, you can dim the light of some areas. Four-grade dimming of EZ dimming already can meet this basic demand of dimming. Situational lighting and other areas which need stepless dimming, manufacturers can develop their own remote control dimming or other dimming programs, but must meet the specifications of power factor, efficiency, and standby power consumption.

 

LED Multi Color Lights Create Fun Playroom for Children

24 Aug

Children are always enjoying playing, a brightly colored playroom for them to daydream and use their imaginations in will be the best present for them. Using LED multi color lights instaed of normal lighting can make the room more charming and interesting. The children can choose the color that they want the room to be for that day and when the walls are painted white, the entire room is going to glow with the color of the bulb that is chosen. These lights can even be set to change at certain intervals so they kids can have a lot of different colors changing throughout the day.

Children are inspired by color and from the time they are born until they reach puberty, they learn about color and use it as a vehicle for their imaginations. A brightly colored room can greatly help a child to improve his ablility of imagination. Paiting the walls in bright colors may cause health problems to children, and some families live in apartments or rental homes that do not allow for the walls to be anything but the white they are already painted.

Painting the wall in bright colors is not the only way to create a brightly colored palyroom for children. LED multi color lights is another feasible way to replace the way of painting the walls. Children can set these lights to any color that they desire and the lights are going to reflect on the white walls the color that is chosen. If the child wants the room to be red, then the light should be set to red and they will turn the entire room red. The same can be done for each color. It’s also a lot of fun for the child.

LED multi color lights can also be set to randomly change colors at any interval as the children want. For instance, the colors can change each second or every few hours. The LED multi color lights can also be set to create a wide variety of colors by being displayed two at a time. If purple is wanted, then blue and red shining at the same time are going to create that color and so on. These colors can also be programmed so the child can have many different colors reflecting throughout the day. LED multi color lights can last much longer than other lighting types, meanwhile consume much less electricity.

A colorful playroom for children can be very important for them to extend and widen their imaginations. When painting the room is out of the question, LED multi color lights can be used to make the room have the appearance of different colors. The children can choose what colors that they want displayed and can even have them switch out colors at certain time intervals. This means that the room can be any color at any time the child wants it to be.

 
 
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