Here are some pix of a MagD-based 3x3W luxeon bike light I am working on.
Its not finished yet -- still waiting on a few parts (power cable, UCL lens,
pot /w switch, mount, etc.) -- so I haven't ridden with it yet. But Ive sparked
it up and I'm pretty amazed how bright it is.
I'm using 3 TX1K Lux III's, 1000ma BuckPuck (with external pot),
modamag's PTS2-D, IMS20 reflectors. Plan to run on Li-Ion 2400mah
batteries in a water bottle.