Finished installing some lights in the new topper tonight. The cheapo factory dome light was basically useless, and I didn't want to pay for the expensive options to add a led strip from the factory. I put in 2x 24" light strips/bars from SuperBrightLED's and 4x little 2.5" red accent lights with a 3-way on-off-on switch to pick between white or red and a gas prop switch to turn them on when the hatch opens. I wanted red for night coyote hunting and times I didn't need all the bright white light, I think those little strips put just about the right amount of light.
3D printed a switch housing
And 3D printed mounts for the white LED's that just velcro to the roof