Indeed. And for some reason the ones I make myself always turn out so much better (and brighter) than the aftermarket ones I've tried.
If you ever want to make your own here's where I tend to order my LEDs from in quantities of 50 or 100 at a time.
eBay Store - Chi Wing LED product shop: LED: 1000 UV Ultra Violet LED- 5mm free shipment
They're not hard to make. Just tedious and repetitive soldering of a parallel array of LEDs.
Edit: Just ordered parts to make an LED headlight that can output 450 lumens @ only 8-1/2 watts! Compared to the current headlight, that's 30% more light at half the power consumption.