My confession: I use four 3-watt LED flashlights, 80 lumens each. They work very well and cast a good, focused beam together. $25 each.

The batteries are AA rechargeables, NiMH. They were $22 for eight batteries. I have two charging units, at $10 each. That's about $150.

(The good part is that I started with one, and added one, then another--one at a time as money allowed.)

Another plus is that it's a very lightweight setup. My old halogen 35W homebuilt used a very heavy lead-acid battery, but it worked great and was die-hard.

Hey, I'm a do-it-yourself-er.