http://www.fobsun.comsales@fobsun.com

FAQs on Down Lights Series

Part 1: Technical Questions

Q: Can I use down lights outdoors?

A: No, it can only be used indoors for dry environment.


Q: Which control modes can it work in? What's the difference between them?

A: Only the RGB version can be controlled by constant decoder with power supply. It adopts PWM technology.


Q: What is the beam angle? Can we get requested beam angle?

A: The beam angle of down lights is 30/45/60 degrees. Yes, we can also offer the requested beam angle as per customers' requests.


Q: What's the operation voltage?

A: Its operation voltage is 100-240v ac; generally we provide 110/120v ac for North America, 200-240 v ac for Europe. It is available for specific input voltage of 24v dc as request.


Q: Which models are available?

A: Currently we have 3 versions. They are round shape, pendant ceiling and panel or grille down lights.


Q: What is the color of down lights?

A: There are white (2700k-3500k), warm white (6000k-7000k) and RGB available, also we can customize as your request.


Q: If one LED fails, will other LEDs fail?

A: No, if one LED fails, the remaining LEDs will still work.


Q: Is there any accessories?

A: No, it was packed in paper boxes, come with drivers and cords, you just need to connect and play.


Q: Can they be linked to each other and what about the maximum quantity in series?

A: there is no limited for single color down lights.


Q: Are the down lights series lights dimmable?

A: Yes, the lamps matched dimmable driver can be dim by controlled by traditional ELV dimmers. The most dimmer is ELV dimmer in the world. They will compatible with most dimmers we test.


Q: Does the down lights get hot?

A: Hot is a relative term, t5 and t8 tube lights were made of aluminum housing whose physical structure is more in favor of heat elimination.


Q: What is the lumens output of your down lights?

A: The down lights is about 80-95 lm/watt., Our led down lights have a light efficiency of 75 (white) and 85lm (warm white) per 1w led, while 130 lm (white) and 100 lm (warm white) per 3w led, so a white 5*1w lamp, would produce 5*75 lm = 375 lm, a white 5*3w lamp, would produce 5*130 lm = 650 lm.


Q: What’s the led type of down lights and what brand of your LEDs of the down lights?

A: it adopt SMDs, the model is CREE 1 watt or 3 watt, Edison 1 watt or 3 watt.


Q: Does installation need to be finished under power off?

A: Yes, please keep power off until you finish all the installation, or the fuse of driver will be burned.


Q: How much is the down lights?

A: Pricing should be comparable to a compact fluorescent down lights, trim and lamp.


Part 2: General Questions

Q: How can I pay for my orders?

A: We prefer TT and L\C payment, also accept Credit Card.


Q: What shipping options are available?

A: For small orders (under 100 KGs), we usually use International Express, such as DHL, FedEx, UPS and TNT, and deliver to your door within 3-5 business days; for big orders (over 100 KGs), we use regular air shipping and deliver to your door within 3-7 business days; for order quantity of containers, ocean shipping will be adopted and shipping lead time will be around 15-25 business days.


Q: What's the lead time of it?

A: We always have the goods in stock, could ship them out from our warehouse 24 hours Express after confirmation the payment. So for sample order, we can usually dispatch immediate shipment.
For large volume order and special custom order will be determined case by case. Please confirm with your International Sales on each order.


Q: What is your warranty policy?

A: Usually we offer 3-year warranty unless specified in contract. Please view more quality warranty information at www.fobsun.com


Q: Just how long is 50000 hours?

A: 50000 hours lit for 24 hours per day will last over 5 and half years.
50000 hours lit for 12 hours per day will last for over 11 years.
50000 hours lit for 8hours per day will last for over 17 years.
50000 hours lit for4 hours per day will last for over 34 years.


Q: What if I have a question that’s not covered in this list of questions?

A: Email us.


Q: why should I replace the conventional lights with LED?

A: The main targets are both white, including warm white light sources and color light sources. The latest LED technology opens up wide areas for new applications, new technical possibilities and reduced costs. The main advantages of the state of the art LED light sources are:
(1) The life time of an LED reaches or frequently exceeds the life time of the application and there are often no special changes necessary. If one defines the failure criteria as end of life when the light intensity of an LED has reached 50 % of the initial light intensity, depending on the model, one can calculate numerical life times above 100,000 hours for LED Chips based on GaAs.
(2) In the case of colored light the power consumption is below the power consumption of white light sources with filter glass (see table below). White LEDs can now reach the level of fluorescent triphosphore tubes and standard white LEDs show a better efficiency than incandescent or halogen lamps.
(3) The radiant intensity of an LED is controllable in the whole range without any change in the light properties (e.g. dimming of incandescent lamps leads to a shift in color temperature) and any time loss (switching time of LEDs for general lightening < 1 μs). The PWM (pulse width modulation) is the recommended method for the dimming of LEDs. Dimming by reduced DC current may lead to inhomogeneous appearance of LED arrays.
(4) Compared to the high efficient light sources of fluorescent tubes, compact lamps and metal halide high-pressure lamps the switching time of LEDs is very short. This plays an important role especially for applications like head lamps and brake lights in automotive and traffic applications.
(5) LEDs provide excellent stability for mechanical and thermal stress. The reliability of an LED is described by the different failure mechanisms, the spontaneous total failure of the LED and the reduced light intensity of the LED. To calculate the reliability of an LED array one should use the data for spontaneous failure. They should be in the range of 10 ppm/h within the first hour of operation including solder processes and below 0, 1 ppm after the first hours of usage.


Q: What is IP Rating's?

A: The Ingress protection system is an international standard and allows you to easily see how resistant a product is to different environmental elements.


Q: What is lumen?

A: Lumen is amount of light emitted from light source.
According to Wikipedia, "If a light source emits one candela of luminous intensity into a solid angle of one steradian, the total luminous flux emitted into that solid angle is one lumen. Alternatively, an isotropic one-candela light source emits a total luminous flux of exactly 4π lumens. The lumen can be thought of casually as a measure of the total amount of visible light emitted." For example, a standard 100 Watt incandescent bulb emits about 1500 lumen.


Q: What is Lux?

A: Lux is lumen per square meter.
According to Wikipedia, "The difference between the lux and the lumen is that the lux takes into account the area over which the luminous flux is spread. 1000 lumens, concentrated into an area of one square meter, lights up that square meter with an illuminance of 1000 lux. The same 1000 lumens, spread out over ten square meters, produce a dimmer illuminance of only 100 lux."


Close
Print