I used to have two of the UFO lights, that what we called the circular battery powered led lights Walmart sell s for $4-6 they worked great in my old tent trailer. But it did't have a great place to hang them in the Hawk. I just purchased 3 LED arrays with 36 LEDs each from http://www.superbrightleds.com. they were pretty cheap, Like under $40 for all three I think. I got and amber for the rear outside light and two white one for the inside. they come with the base wired to go right into you existing fixtures, you just have to order the correct one. On the inside I put it in the first position on each fixture; if I move the switch to the second position I get one LED and one incandescent, the LEDs are enough most of the time. Great for dry camping they don't draw much from the battery at all.
Of course I still have a few good LED flashlights stashed here and there in the camper and truck.