easily over 200sf
You can use your switch, but you need to set the time on switch in the unit. I use my switch when I want to go into the closet and not have the light go on!
NO
I mounted one on the ceiling in a closet. It works fine.
I searched the internet and the answer is no. However there are other shapes available in smaller sizes.
The light bracket has 2 curved slots that the mounting screws go through and you can then rotate the light left ot right to get it straight.
You can set it for different times, from 30 seconds to a minute, etc.