The wife requested an over head light for our desk.... i happen to have a 12v power supply, LED strip and 3d printer laying around this is kind of a fast sketch up and execution, but it works. The bars fit in the holes of the brackets tight enough to stay in place. they can be turned so that they shine more towards the wall or yourself..
0 infill on the connectors and the bar for the led.
10%or greater for the peg board hangers