Luxeon Lime arrives – thanks to Lumileds
Having written about Lumileds’ 200 lm/W Luxeon Lime, the most efficacious LED yet because its output is close to eye maximum sensitivity, I asked for a couple of samples.
And here they are.
These are the first LEDs I have seen on ordinary FR4 PCB substrates using Lumiled’s 33 thermal via pattern.
In this case, it is 1.6mm FR4, which as far as I can see means 16K/W junction to heatsink. With 0.8mm FR4 this would 10K/W.
Application brief 32 deals with this heatsinking.
Now, all I need is some spare time to make up a mounting to try them.