Thanks for the recommendation, guys. I was looking for a replacement for the 48V worklight on my lathe. Given that the bulbs are pretty much impossible to find, and the transformer would need replacing anyway (was 415-48 but now running the lathe via an inverter so only 240V available continuously) I ended up looking at the lights from RS and so on at £100-120 or so. Fortunately, I saw this thread before I ordered and ended up with a couple of 10W LED fog lamps. Small, run cold, give out lots of light, and just need a cheap 12V power supply. I went for fog rather than spot to give a slightly more spread beam pattern and something not too bright. I've just tested them on the bench and they look very good indeed for this job. And for just over a tenner, post paid. I'll bolt one of these to the existing worklight arm on the lathe and probably use the other one on the mill.