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100% of customers would recommend this product to a friend (1 out of 1)
Involvement Level: Expert (understands the inner workings)
Pros: I made several attempts to get an acceptable high power LED light for living room. Cold white emitters were not comfortable. I tried other warm white emitter plates e.g. SKU 142033, but these gave an inacceptable kind of brown-green light and were very inefficient. This product finally has a nice warm white color. Objects look natural. The emitter plate is big, about 5x5 cm. I screwed it on a big CPU cooler using heat-conductive paste and also installed a very slowly rotating fan (8 cm), using 8 single LEDs and a 10R resistor in series to lower the voltage. The chip is easy to solder. I used a constant current power supply from ebay with 32-36 V and 1,5 A resulting in 50W ("RD50-36", 15 Euro, made in China). This is only half the rated power of the LED chip but more than enough for the room. Maybe it's about 4000 lm with this 50W so efficiency is ok.
Cons: The color is a bit yellowish but not too disturbing. Without active cooling it is running quite hot or you need a big cooler.
Other: It's a pity that DX only publishes positive or merely positive reviews and does not so with negative ones in other cases.
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