I have also pondered putting a nother light further back due to lack of lighting in the rear of my Aveo5 Hatchback. I have the factory privacy cover for the truck so the lights wouldn't help that are back there and those are only based on the door being open I believe. But same time I haven't had a MAJOR reason to put one in either. The TRUCK area on the other hand was a different story. I replaced the light with an LED bulb I got on ebay for like $5.00 and still found it to not light the truck well enough for use at night. So I found a small 6 or so LED Diode Panel light at Auto Zone which I then just wired from the existing truck light simply using the bulb holder as my connection point (theres a nice lil hole in each clip to put the wire thru, no splicing needed) and ran that wire behind the lower upholstery panels to the right side where I then poked a small hole in about that same spot as I figured best matched factory light and put the wire thru that. Connected the LED Panel to this wiring and used some extra heavy duty plastic command strip to hold the LED panel in place. Did this at least 2 years ago now and still in perfect shape and the sticky strip hasn't given up yet. Note the pictures I took with the lights on. Since I hooked it to the existing door light.. It will turn both sides on when I open the hatch. Couldn't have cost me maybe more than $20 or so for it either.