I recently installed two dome lights over my from seats of my mule. I purchased them at Menards for $8 each. They are battery powered, can be removed if needed to use as flashlights. They take 3 aaa batteries and I imagine I'll get a couple years minium out of a set. You could zip tie them to the roll cage if your feeling lazy. I used rivets on mine. It was a piece of cake and work amazingly well.