I've got lots of lighting options available to me, but for single light source, low key, I frequently found myself using a cheap old hardware store clamp light with a 100W equivalent bulb.
I decided I needed to up my clamp light game, so I picked up a fancy polycarbonate clamp light (which has a much better clamp), a dimmable 100W equivalent LED bulb, and a lamp dimmer, so I have control over the light level. I haven't had much of a chance to play with it, but it's got potential.