There's been some past discussion on this topic so I wanted to point out
that crappy tire has a 1/2 off sale on their peel 'n' stick LED lamps. These
are about 2.5" inch flat discs with three very bright white LEDs $4.99,
including batteries. I bought one for the dark passenger side of the front
of the van and it is really bright. Push on push off. At this price they're
a steal. A dozen of these and you could turn your van into a grow-op.

Nathaniel