This thread got me thinking and in the mood to experiment. I have a spare Cateye HL-1600 (rechargeable 2.4W halogen) I took the plunge, and ordered up a selection of Luxeon LED units, a 1W star, a 3W star and a 1W+integrated optics unit. Each of these looks to be suitable to fit within the cateye casing, without permanant modification of the original components, so if this is a failure I still have a backup light, plus a set of expensive xmas tree decorations.

First approach will be simply to adapt each LED to the case, and wire up with a suitable ballast resistor to ensure the correct current in the device. If this shows promise, I'd like to develop a dc-dc convertor to avoid the inefficiencies of the resistor approach.

I will post again when I've had a chance to experiment.


Cheers,

Ed


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Oh, I have a history of meddling with this stuff, my other HL-1600 received uprated 2100 mAH niMH AA batteries and a 4.2W bulb a while back. Result:more light for about the same run-time, very satisfactory.