I use a two lamps - one on either side of me, about three feet apart. I just have regular 60 watt bulbs in each. I have a I have magnifying glasses that I wear and for extra details, I use an additional 5x loupe. I've been happy with it so far. Sometimes, I have to tilt the coins one way or the other to get all the details.
Law of Logical Argument:
Anything is possible if you don't know what you are talking about.