Just got my latest subscription copy of ME. Glad to see old friend DAGB is still going strong. I thought I might add a little to his article.
In the late '90s (?) I bought a couple of goose-neck 12V halogen machine lights from Warco. Similar ones were quite common around then, and probably since. Good light, but unpleasantly hot, so a mixed blessing when working close to the lamp, as in when using a Unimat with magnification.
Last week, I finally got around to the mod I'd been intending to do for years. It took about 10 minutes (isn't it always the way?). The bulb, reflector and bulb-holder were removed, and a MR16 LED down-light 'bulb' was installed. I used a pukka ceramic MR16 socket, which came with fitted flying leads and cost next to nothing, but a couple of terminals separated from a small 'chocolate block' can also be used. More details of the mod would be superfluous – its obvious once you start, and dead easy. Lamp transformed!
Hopefully, this mod is common knowledge, and I've wasted your time reading this, but if it isn't common knowledge, it should be!