Here is a very handy light to keep in the truck. I use it more than any other light when working on the truck. The little LED heads live on long flexible stalks, so you can get them deep into your work. Dual heads mean that you can light from 2 sides, so your tool doesn't block all your light. The base clips onto any handy thin structure. Three AAA batteries last a very long time.
"Mighty Bright XtraFlex Duet Super LED Music Stand Light"

Long ago, I got 2 of these for my musician daughter. When I got my C3500, I found myself borrowing one so often that I just got her a new one to replace the one that now smells a little like diesel.
http://ecx.images-amazon.com/images/I/11Tn47hBwaL._SL500_AA300_.jpg
"Mighty Bright XtraFlex Duet Super LED Music Stand Light"

Long ago, I got 2 of these for my musician daughter. When I got my C3500, I found myself borrowing one so often that I just got her a new one to replace the one that now smells a little like diesel.
http://ecx.images-amazon.com/images/I/11Tn47hBwaL._SL500_AA300_.jpg