Turntable Illumination - Recommendations?

+1 on the Jansjo from Ikea.
It provides a good amount of warm, easily directed light.
I use the clip-on version.
A very inexpensive, decent looking solution.

I use this one:
http://www.ikea.com/us/en/catalog/products/70169694/

Thank you all for the background info and suggestions. I'm going to give the Janjo from Ikea a try. Its appearance is unobtrusive and it is also quite inexpensive.  
Again, thanks, Mike.