I just installed 2 cams on my back patio that are powered by a light fixture. It’s a fully enclosed patio with an 8-foot fence, so I didn’t do anything pretty. My installation is also a little unusual, but it should still give you an idea what an installation might look like.
I needed a cam for the patio (‘Squirrelcam’, as it’s there to watch out for them eating my fence), and a cam for over the fence to look at the backyard and my back door. So I needed power for 2 cams.
The two-sided adapter shown as the first item in Loki’s post was too wide for the neck of my porch light’s globe when you plugged a power adapter into either side of it, so I used a socket adapter like the second item, clipped the ground off a 1-to-3-outlet adapter, and plugged the two cam power adapters into that.
You can buy the first and second adapters in Loki’s post for around $2 at Menard’s. You get a 2-pack of the second adapter for that. So this doesn’t need to be expensive.
I didn’t need a light bulb because I never light the patio after dark. However if you have room for one and want it, you can get a dusk-to-dawn light bulb. Since your cams will probably be powered forever you won’t want a standard bulb in there.
I had to drill a hole in the bottom of the fixture to let the cables out, but there was already a smaller hole there to let moisture that runs down the outside of the globe out.