Luxeon K2 led

A red luxeon K2 led from Farnell arrived yesterday. I hooked it up to a simple current limited circuit and tested out its capabilities. I must say, this is one of the brightest leds I’ve ever seen. It’s so bright that even if you look indirectly at it, you’ll get retina burn. This red led is rated at maximum 75 lumens at 750ma. I reckon the brightness you see below are about 50 lumens as I was running it at 500ma only.


The Luxeon K2 led. Brightest led in the world (as of now).


I had to mount the led on the heatsink to prevent it from burning up. The heatsink gets pretty hot after a while.


Interesting halo effect.


Close up.


The focused beam on the celling.


And when it’s dark.

I’m still waiting for another blue and white Luxeon K2s so I can use the white one to build an uber bright torchlight capable of blinding people. The white luxeon led will emit 130 lumens at full 1500ma. The red and blue ones will go into other projects.


In other news, toys ‘r’ us are selling grenades to train young terrorists. Better to start young they say. Continue reading