Bridgelux, Cree or Epistar LED?
This is a tough one to decide which forum to post. Three brands of LEDs. In a 3 watt format, is there a clear winner for performance? Or more likely, a clear loser? Performance means efficiency ...
Forum Discussion
The only comparison that matters is power rating and lumen output at realistic temperatures. Many advertisements list a power rating and lumen output for 25 C, which is utterly unrealistic for an LED.
Cree has decent specs at 85, 105 and even 125 C. Philips Lumileds have LED rated to operate at 125 and even 150 C
I know nothing of the other brands you mention, all my engineering experience has been primarily with Philips and some Cree products.
So - check the datasheet for your favorite product, and see if they maintain their 3 watt output rating at a minimum of 85 C.
Cree has decent specs at 85, 105 and even 125 C. Philips Lumileds have LED rated to operate at 125 and even 150 C
I know nothing of the other brands you mention, all my engineering experience has been primarily with Philips and some Cree products.
So - check the datasheet for your favorite product, and see if they maintain their 3 watt output rating at a minimum of 85 C.
