Shouldn't matter. If the junction box is flush with the surface, the light will attach TO the box with a mounting bracket like one of these:
Screw that to the junction box...light fixture attaches to the bracket, usually with screws that go into the bracket...then through the light housing.
https://www.youtube.com/watch?v=oIQlN7KxWM4
Yeah...most lights come with those. I installed all 1 gang boxes on my exterior light fixtures recently because it's far easier to cut a rectangle out of the mounting blocks than a circle.
Most outdoor fixtures are rated for wet conditions and the circuit itself should be either branched off a GFCI fixture or on a GFCI breaker (current code). If it's covered and not likely to get wet, you should be fine. One thing to do in that 1 gang box is seal it up with caulk to keep air from leaking into your house. That way you may not have to worry if the light fixture allows cold air in.
Shouldn't matter. If the junction box is flush with the surface, the light will attach TO the box with a mounting bracket like one of these:
Screw that to the junction box...light fixture attaches to the bracket, usually with screws that go into the bracket...then through the light housing.
https://www.youtube.com/watch?v=oIQlN7KxWM4
How is the existing light connected to it?
thats exactly what i need.. what section of home depot is that in.. hahahaha jk
It would never occur to me that any man wouldn't know this.