I use a Dolan-Jenner Fiber Light model 190 which is made for laboratory illumination: http://www.dolan-jenner.com/Pro/190.htm
It has a nice, infinitely positionable goose neck and is extremely focused and bright. Look on epay for a used model. I paid less than $50 for mine.
It has a nice, infinitely positionable goose neck and is extremely focused and bright. Look on epay for a used model. I paid less than $50 for mine.