Forum Discussion
MEXICOWANDERER
Apr 04, 2017Explorer
All of my personal LEDs and the array here in the supermarket are controlled. With my 0-60 volt power supply I have tested an enormous amount of non regulated LEDs and found none of them suitable for 12.2 to 13.6 volts variance. Most gained 300% brightness (as a guess). ZERO of more than 100 cheap COB plates have survived three years. 90% are complete failures while remaining have 1 to 10 unlit chips. Zero of my high power to 500 watt structures have failed and some endure 16 hours a day for the last four years. Millamp regulation plus proper heat sinking is life-or-death for an LED. Few vendors know or care about this. I have had to repair a dozen plus sealed 120 volt "floodlights". Power supplies OK chips fried. All four screws on EVERY LAMP CHIP were found to be stripped. It gets better - very little thermal paste was used between chip and base and get this (!!!) the dummies powder-coated the entire lamp and did not remove the powder coating beneath the chip! I had to re-drill and tap use new M3 screws, and better thermal base and top quality SURE chips. Without fail the lamps gained 150% lumen output compared to new. China "engineering"? Shirley you jest.
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