I had a flat concrete slab (shaded) where I put it.

Make sure you dont have any major shade that comes over your house otherwise it will affect how much power they generate.

Most of life is differing shades of gray.

There are shades of clean.

I'm probably 10 different shades of wrong.

I try to use the same colors in every rental so we always have leftover for touch-up jobs without maintaining 30 different cans.What shade of gray do you use?

Really the only assumption on that statement is that the roof has relatively good solar access (room and not terrible shade).

We all got along pretty well and took turns cleaning the shades spaces eg mopping floors and cleaning toilets.

I'm not throwing shade.

This answer applies to Philadelphia, DC, Pittsburgh ... lots of cities with shades of similar problems.West side for example Poppleton has 51% poverty rate like Kensington in Philadelphia.