LED lights - build 'em yourself?
We're off to do a night relay race next weekend. I've got a few lighting options, but one of the things I've been toying with is building a set from scratch. It seems to me that with LED bulbs getting cheaper every day (http://tinyurl.com/ledbulb) and rechargeable batteries increasing in capacity *and* getting cheaper (http://tinyurl.com/7dayshopbatteries) it should be possible to work up a decent 3W system with a 2.5Ah battery for not much more than about £25, assuming that you've got a few bits and bobs (like old light mounts and bits of wire) in your shed.
Anyone got any experience of making an LED light set?