What is the proper method for wiring exterior sconces? I have framed my carport to garage conversion and I want to flank the garage door with sconces on the outside. I am installing vinyl siding and I bought the J-channel blocks for lights. The blocks are 4"x6" and about 1-1/2" deep. I figure I run romex through the sheathing and to a octoganol box and then the block over that, install the light and caulk around the light to the block. Is that the best way to do it? Is there a waterproof box for this or?