I installed six of these on a pole barn. I liked that they were narrow enough to fit between the ribs on the corrugated steel wall. It took me less the five minutes to install each one. No box is needed because there is plenty of room inside the fixture to make the connections, but these will mount to a box of you need them to. They are very bright and the photo cell is not overly sensitive as some of the reviewers seem to indicate. I would highly recommend these.
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