I have found that putting a single-lense halogen work light on my bench clears up the problem you have described. They are about $10 and work like magic. Only down side is that they chew up electricity.
The single bulb halogen works I am familiar with are 500 watt lights. I find these tend to cause eye burn after welding all day if they are placed too near the work area. A work distance of 8 feet seems to make for easier viewing without hurting my eyes.