Backyard Lighting

It's simple. Boring, really. I want to hang outdoor Edison bulbs over the concrete patio, just like everyone else in 2020. Amazon sells a nice Banord 102' string for $86. Plug it in at an outlet under the eaves at the west corner of the house, control the outlet with two, three-way switches at the two outside doors, and we're done.

110' zig-zag, so we don't run all the way to trees

Update: After extensive testing, the sewage ejector appears to be alone on 20A circuit #29. Also, there is an overlooked outlet in the breezeway that is on circuit #3 along with the outlets in the living room.

Further, the under rail lights might be Strip LEDs. See https://hitlights.com/. 

This lights the main concrete patio and, incidentally, the lower deck. Soft under-railing lighting seems better for the upper deck (although we have to light the steps specifically). A low voltage transformer and foliage uplights scattered about should make the yard usable after dark. 

Both trees conveniently have no lower branches

I imagine a noose of rope around each tree, with a length about four feet pulled taut by the light string. That way, the string of lights won't go all the way to the trees, lighting the planting and shining on the tree trunk. Also, the 102' string will work, since it shows 110' on the plan, which doesn't account for catenary sag or other real world issues.

Adequate headroom, judging by the door height

The idea is to take the power now connected to the sewage ejector and connect it to outlets in the breezeway notch, and on either side of the lower deck (shown in purple in the photo). The lights are powered by a switched outlet up at the eave, controlled by 3-way switches at the BR3 door and the glass door at the breezeway. The low-voltage transformer can plug in to the west-most outlet. (Not sure whether to put the lower deck switch where shown (above the folding chair) or between the door and the window. The latter is a little more natural, but it's in the way if we remodel the window.) Oh, and of course, the sewage ejector plugs into a third outlet which has the GFCI for all the other devices.

We can do better than Romex popping out of the wall.