So when I first got these I noticed that the directions (print) is very, very small (I'm old) and not really clear. There is a bottom knock-out on the light but that would mean that your wires would have to be seen outside the unit. You will need to drill an 1/2" hole in the middle of the base. You will see that there are several depressions in the base but no direction on which or where to drill. You cannot attach this light to an existing bracket (it must be attached to the wall base) and there is no attachment screws to go with the unit. I used the foam backing (which also has several knock-outs to guide me as to attachment hole placements. Then took a drill bit and drilled through the base to attach the light to the wall. I then used two common screws and attached the base to the wall. Wiring was easy but I noticed that the unit sits off the wall approximately 1/4" so I will have to seal that as well. The good news! These lights are extremely bright, clean looking and function VERY well. The come on a dusk and off at dawn. Good value for the money. Just gotta have the right drill and bits.
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