my buddy on LAPD riot squad uses a handheld spotlamp that projects a focused beam up to 1 mile.  5,000 WATTS bulb, 24 volt rechargable LITHIUM batteries (yes rechargable lithium!!). solid state circuitry.

they use the STUN setting on the lamp to make it flash like a strobe. anybody looking at it gets disorientated and sometimes sick.
on the regular beam, you can light up the street, for 1 mile.

price tag (US $)  3700.  

trying to convince him to make one fall off the back of a paddywagon.

its all about BLUEBERRIES.  They decrease the time for the "refresh rate" of the film in your eyes that burns images you see.  Some world war fighter pilot swore by them to see better in the dark.  They don't actually give you night vision,  but help you recover from bright flashes of light in pitch dark.

Try it out sometime  

Actually, the fruit  
Its got something in em that help the cells that move around to make images on the back of the eye faster.  Bright light makes them all go nuts and takes awhile to reconfigure themselves to take the next image,  eating blueberries helps this process.

And I thought carrot is good for your eyes. I suppose it still is, after all how many blind rabbits have you seen ?

BN,
You have no idea how bad I want to go fishing today.  however, I gotta WORK.  

Tight Lines.  My brother will be there though.

Alright, a little thread revival here... I returned the cheapo led headlamp that I got from Army & Navy. Heading out to M.E.C right now to grab one I have had my eye on.
Petzl Myo 3. I'll tell ya how she works.
RobertO