As mentioned by tallchick the light Jamie Wallen demonstrates is great. I asked my husband to make me one. I use it about 90% of the time. Before I got this light, I would have to run my hand over the quilted areas to know which areas had already been quilted. (I like to blend my threads plus some fabrics are SO busy).
I do have a black light but have never used it because of how much I like the side light.