I bought these inexpensive light bulb bases at Home Depot for $3.98 each and added a 6 watt LED Cree bulb for @ $10 each. The light is very even radially from the bulb, it has a colour temp that is much the same as an incandescent bulb, it is equal to a 40 watt bulb. They give off no heat and more importantly they do not seem to attract mosquitoes.
I'm going to add a few more around the truck now that I have tested one unit.

