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LED Book-Light Suggestions?
Dormous asks: "My wife and I are both night owls and avid readers, and usually one of us goes to bed before the other, hence the need for a small portable light source. We recently had a booklight, and somehow, my wife managed to shatter the light bulb all over the bed. Therefore, I want to find a booklight that uses an LED as the Light Source. Anybody got any ideas where I can find such a thing. I've already tried ThinkGeek."
Most of these little clip-on booklights take two HP7 (AA) batteries, giving 3v. Remove the incandescent bulb (or bits of, in your case). Solder a high-brightness white LED in place of the incandescent bulb, and add a series resistor in there somewhere. You'll need to work out a suitable value - some LEDs may not need one at all.
Another handy mod is to use a fairly bright red LED instead of white. This will make a light that's great for reading maps and star charts at night (for you navigators or astronomers) that won't mess with your dark adaption.
Demotech ("Design for self-reliance") is currently working on the Nightreader.
It's a small piece of reflecting foil, put together with two leds sticked in wood and a couple of batteries. The Nightreader is designed to be able to use two or three batteries of various sizes (whatever you have at hand) which have to little power to be used for something else.
I have two of these, bought through ThinkGeek, and they're great. Both of mine are still on the first set of batteries.
You can convert any flashlight to LED. These guys have a nifty little LED flashlight replacement bulb in all the normal colors. You can buy one here
I figure that must be how his wife broke the old light ;)