What you get is another set of lights that illuminates the floor area when the door is open. As a test, the light of the LED was enough to find all the screws that I took out to remove the door panel... would have been impossible to find them without it, without a flashlight.
When the door is closed, the LED just barely fits between the "trough" of the door, and the kick panel. The LED does actually move the kick panel a little bit when the door is closed, it's doubtful that this will have any long term consequences as those little lights are pretty tough, but I guess if the worst happens I'm out $7 and an hour.
82 fj40, 99 uzj100, 06 gx470
97 DR650, 05 525EXC, 01 XT225, 89 TW200, 09 TTR125, 07 TTR90, 07 CRF50