+18 Light Fixtures For Metal Building References. By mike litchfield, michael mcalister. These clamps are usually installed outside buildings, poles, and other structures as an easy way to mount lights or other electrical equipment at the desired location.

Natural lighting is the use of sunlight to illuminate the interior of a building. Web whether you're looking to spruce up your metal building or add a little extra security and visibility, exterior lighting is a great way to go. I found very little information on wall penetrations through steel siding for light fixtures while researching on line so i am sharing the solution that i came up with;