5 ways to judge LED Quality
It is well know that LED is the cord of led lighting. its quality place much important to led lighting lifespan. Then we introduce 5 ways to judge the LED Quality 1. LED Brightness Under same 350mA current and DC3.0-3.5V situation, Higher brightness it has, better quality it is 2. LED Chip brand and Size LED Brand has NICHIA,CREE,BRIDGE,EPISAR, GENESIS. Most famous brand it use, better quality it has; Bigger chip it is, better it get 3. LED Light Decay LED Package glue material has epoxy resin and silicone glue. For same Epistar 14mil White chip, using epoxy resin glue package, under 30 degree working enviroment, After 1000 hours, the brightness will lose 70%, On the contrary, if using Top quality silicone glue, under same working enviroment, the light decay is only -6%. As Epoxy resin heat conduction is worse, so it could not help led dissipate heat. then it influence the led working life; The LED lose brightness slower and even more none, the qu...