Pedalinbob, your 2aa/micropuck light does sound interesting. For this application I'd been thinking in terms of something lower powered and ready made. A 1AA (instead of 1AAA) version of the Tracer would be perfect.
New to site but looks interesting. I'm trying to see if I can adapt an LED headlight for use in the operating room. One came on the market (www.visiled.com) last year but I cannot contact the makers to get a price (have heard they're asking around $3000) I've found a cheap $25 headlamp from China with a ?1W luxeon star. It's not bright enought to keep up with a halogen or xenon source I presently use. It runs on three AAA batteries and I'd like mine to use a 7-12 V rechargeable lithium and ideally should run for 4-8 hrs. The light from the headlamp I bought was too blue. Anyone with any ideas?
Thanks for the reply. I've been studying the luxeon products. The five watt light, from what I can tell, will need a heat sink in addition to the one built into the PCB. I was hoping to use one or two lithium ion camcorder batteries to power this contraption. The guys at www.visiled.com claim 4 hrs run time and hot swapable batteries on the headband and the whole thing only weighs 16 oz. The hot swap seems doable if a large enough capacitor is added to the circuit but this is not that important a feature. With a battery belt they claim 9 hr run time. I just don't know how much light to expect from a single luxeon star 5. Everybody expresses light output in different measurements. As I said, I bought a headlamp prety similar to yours made in China. I opened it up and it has a luxeon star-presumably 1 watt. Also thought of swapping it out for the 3 or 5 watt star. I could put the voltage regulating circuit in the space that now holds the AAA batteries and attach a 7.2 volt lithium battery to the headstrap.