I picked up a handful of inexpensive LED flashlights from Harbour Freight for $5.99 each. Granted, I think that 99% of their tools are junk, but these lights are awesome!
They have 9 LEDs and a push-button cap. About the size of a Surefire. They won't throw a concentrated beam 100 feet, but to light up a room or to work on something in the dark they are supurb.
For that price I've got one in my truck, one in the tool box, my range bag, the nightstand and in a couple of drawers around the house. And if it walks away, who cares. It's plenty good enough that I'll grab it when something goes bump in the night around the house.