Just wanted to share an easy and functional mod. Since the install of my undercover its pretty dark in the bed.
I purchased a pair of these:
I ran a fused 12V from the battery junction box to a switch I found at Walmart. Since these pull milliamps I didn't use a relay like I normally would for aux lights.
They are about a 1/4 inch shorter than the tracks so they remain fully functional. They don't look very bright in daylight but are very effective at night or in the garage. If I ever get into the A pillar I will rewire to the dome light ground as suggested here and they will operate with the dome light and remote. You can see the LED switch on the 3rd pic, it too is protected by the rail.
They ended up looking pretty clean and simple. A very simple install with some good functionality.