Cheap LED lights for dental loupes?

LED lights are good, depending on how much light you need and how much heat you can absorb.
This reference compares different types of light sources.
There are some great new leds, including CREE xm - l T6, and I'm definitely going to do it.
Do you need a headlight?
If you're going to make a few adjustments, why not issue a problem on BBS candlelight? You might even find someone willing to take the challenge!