500 LED Extreme Flashlight

If you have the time and know-how, why not make a 500 LED flashlight?  The crafty fellow in this picture, and the video after the break, did just that.  The 500 LED extreme flashlight is massive and uses a full 50 watts of power when all LED's are lit.  Not sure of the weight, but it has to be full of batteries so I imagine it weighs quite a bit.