When I found that Fisher pen link, I also found this Photon Fusion head lamp system. Way cool!
http://www.botachtactical.com/photonfusion.html
Six LEDs, three brightness levels, strobe, auto off, AA batteries, gold contacts:
High Bright - at this level we estimate approximately a 12 hour battery life
Medium bright - the high bright setting can often be more light than you really need. The medium setting still provides plenty of light but will nearly double the battery life.
Low Bright - great for reading or situations where you don't really need a lot of light, this mode will give you an even longer battery life.
Fast Strobe - similar to a typical "strobe light"
Medium Strobe - for signaling or use as a bike tail lamp.
SOS Strobe - for emergency signaling.
Weight - approx. 103.6 grams w/out batteries (or 176.6 grams w/ 3 AA Alkaline batteries).
Hyper-Bright - When you really need a LOT of light, just press the Hyper-Bright button. This gives you even more light, but at the cost of a reduced battery life. We figure a fresh set of batteries will run for about 6 hours in Hyper-Bright. The hyper-bright button is disabled when the light is switched into the auto-shutoff mode. SMASH protection:
Auto Shut-Off - w/ built-in battery indicator - ramps up high brightness and after approximately one minute, will turn itself off. Before it turns off, an internal battery tester will measure the strength of the batteries on a scale of 1-5. The light will flicker once and then ramp down from high bright to off over a period of between 1-5 seconds. The stronger the batteries are, the longer it will take to ramp down.
Smash Protection - to help prevent the light from being turned on and draining the batteries when it is packed in with all your gear. If the button is pressed down for longer than 30 seconds, it will automatically shut off and go into the auto shut-off mode in case it gets pressed again.
It all sounds really cool.
Phil