My aim was to find a strong LED lighting for the attic, which I can mount at one point. Before I bought, I go to check some users’ comment.
Here you can find the final installation View, look awesome.
Final Installation in the Warehouse
Final Installation in the Warehouse
Final Installation In the Greenhouse
But there may be not usable for you. Should anyone want to use the lamp to take pictures or film shots, or produce light for lathes, etc. In a workshop, that should think twice again, because some LED High Bay light flickers (not visible to the naked eye) then but very strong, what you can see on the below picture. Thus, it is for working on a lathe or with drills, etc, actually unsuitable.
Look at below picture, Flickers very strong, like a stroboscope. It is probably on the power supply, which rectifies the voltage only without smoothing. Therefore a frequency of about 100hz. If you have 100 Euro, you have better choice. Avoid this.
One user said it as a weird light. Not comfortable to the eye to work under it But it is not expensive for the output so combined with t12 lights. LOL. Quite Weird.
Let me switch to my LED High Bay Light. It is really heavy. Super bright light. I replaced a 400 watt fixture with this one. It was brighter than the original. It works great over my workbench!
This light is no joke. Awesome construction, brackets and hardware are nice.
|Rated Input Supply Voltage||120 -277 Vac|
|Rated Frequency||50/60 Hz|
|Rated Input Current||0.88|
|DRIVER RATED CURRENT||1.1/0.45|
|Rated System Wattage||100|
|LED Driver Output Volts||48 Vdc|
|LED Driver Output Current||2 A|
|Working Temperature||-30～50 ℃|
|Light Efficiency||≥130 LM/W|
|Certificated||UL Listed, DLC|
This LED High Bay Light has 2 mounting means. One is Bracket, Sheet steel, overall measured 25 mm wide by 140 mm long by 155 mm high. Secured to Driver by screws.
Another is a hook, made of Die cast aluminum, it secured to driver by threads. But some others LED High Bay Light may do not have Hook too.
LED Driver is from MEAN WELL ENTERPRISES CO LTD(E334687 on the UL R/C Product). It provided with integral input and output cord.
This LED driver model is HBG-100-48E. 100-240/277, 50/60Hz, 1.1/0.45A, LVLE, 49 Vdc, 2.0 A, use for WET Location.
In the United state, From the UL 1598 and UL 8750 Lighting standard, the diffuser must have f1! Since factory claimed it has earned UL Certificated. It may has, but please be aware there is trick for this.
If you source lots of LED High Bay Lights, I hope you can go into details. You can required the factory to provide the UL Report to you, you can check in detail, and verify it in the UL.com and DLC.
You can find the Heat Sink, make of Die-cast aluminum, secured to LED Driver by four copper pillars with screws. There is a gap between the LED driver and heat sink. Why do the factory design like this? The LED source too hot?
There is a Aluminum sheet Over the heatsink . Mechanical seured to the heat sink. Check below picture, you can find it.
Unscrew the screws, you can see 3 different parts.They are diffuser frame, Transparent Diffuser and Gasket. Diffuser frame is made of Die-cast aluminum, secured to Heat Sink by screws. The silicone rubber gasket is sandwiched between the Diffuser Frame and Heat sink.
The transparent diffuser is measured 1.5 mm thickness, no idea for other parameter.
The LED Board is aluminum base, 2.0 mm thick, rated minimum V-1(on the board), 105°C, secured to Heat Sink by screws. Overall 100 mm diameter. The wires connected to LED Board were covered by adhesive after soldering.
There are total 210 pcs SMD LED chips. 3030 Type. Claimed form OSRAM 3030.
We try to find the BOM Cost. It is near $100!!! If you buy from the e-com website.
|quite expensive, about $35 – $40
|Osram SMD 3030 LED Source
(Include LED BOARD)
|total $12 -$15(Check Refer 5)|
|Lens||$4 – $5|
|Other(Mounted bracket, screws, gasket, bushing, pillars, diffuser frame)||$10|
If you are an LED light compliance Engineer, or Product Engineer, what is going to test this LED high bay light?
Here is for reference, from UL 1598 and UL 8750 standard. There are total 11 tests!
|2||LED NORMAL TEMPERATURE, SURFACE|
|4||BONDING CIRCUIT IMPEDANCE|
|8||MOLD STRESS RELIEF|
|9||STRAIN RELIEF FOR FLEXIBLE CORDS|
|10||COMPONENT FAILURE ABNORMAL TEST:|
|11||ENVIRONMENTAL TEST – HUMIDITY EXPOSURE|
In this post, I only perform the Input test and LED Normal Temperature test.
The Input Test was conducted to confirm the appropriateness of marked ratings. Which is original from UL 8750, Clause 8.2 requirement.
|Input Volts (V ac)||Input Current (A)||Input Watts (W)||LED Driver Output Volts (V dc)||LED Driver Output Current (A)||LED Driver Output Watts (W)|
The input current and wattage did not exceed 110 percent of the units rating when operated at rated voltage.
LED Normal Temperature test
We also tested its normal temperature at rated supply voltage 120Vac/60 Hz. Running 2 hours.
|Thermocouple Location||Temperature, °C|
|Diffuser, center, inner surface||45.8|
|Wire from LED PWB||51.2|
|PWB board, near LED||52.7|
|Bushing at input of heat sink||49.6|
|Hot spot 1 at driver enclosure||49.8|
|Hot spot 2 at driver enclosure||49.6|
|Directly Above luminaire on Ceiling||37.8|
|Mounting Surface Closest to LED||33.9|
The results of the above tests are considered excellent since the temperature is no really low.
What if failure over time?
General bad performance are like:
- Direct light is not bright
- Shimmering lights after a while
- Twinkling lights and so on
In fact, the main power supply is bad and the light source. Do not worry about that, you can replace the bad LED bulb or bad LED driver.
1) Bad led source
lamps during the assembly process is imperfect, lamp beads and the body is not good contact, thermal paste coating unevenness. Also, if the lamp beads themselves poor quality, long lighting time will be burned.
2) Drivers problem
power supply problems led to some manufacturers due to low-priced products to recover the use of inferior power, failure of product quality, will be used for a long burn lamp light flashing or bright lights shimmering after a while.
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