Following is copy/paste of email from brother. I'd guess he would want a limit of, say....$50. But if something more expensive truly fills the bill, he'd want to know about it for comparison purposes.
"Throw" isn't necessary, as that implies brightness. A dark hospital-type room won't need lots of light.
Perhaps a MC-E type light with a lens that'll throw a square beam and can be throttled back to a decent low?
I have to check on patients throughout the night to make sure they don't die while going through detox. But I don't want to wake them up while I'm checking on them. It would be really cool to have a light that has a very narrow beam. I want to be able to illuminate their body so I can see if they're breathing, but not shine onto their face at all.
I have a couple Cree Ultrafires, nice and compact with the single AA battery. But the problem with all flashlights is that they have a bright center spot surrounded by a huge circle of dimmer light. I tried making a snoot from black paper, but it didn't work so well. I was wondering if something could be done to make the light come out in long, thin, rectangular pattern with no light fall-off (just want a sharp edge).
I was tempted to put a polarizing filter over the lens, and then make something with a slit in it to block the top and bottom. But I don't think that would help a lot with the light fall-off. Maybe two slits set a certain distance apart? I dunno...