Mounting-lights-on-pole-barn, well, it took more work than i expected, but there are lights on the outside of the shed now. the barn style light over the entry door is mostly for character, i still will add some floods under .... Led barn lights is the most energy-efficient, long lasting solution so you can enjoy your led light several years after the normal lifespan of the barn light. additional advantages including lower energy consumption, longer lifetime, improved physical robustness, smaller size, and faster power time., help to mount light on metal pole barn. s. stryped. contact options for registered users; posted on september 28, 2009, 12:59 pm; i planned to use a motion detector with the two flood lights centered above my garage door. i started cutting thinking i would put a plastic box behind the metal siding inside the garage.