Projector on a concrete ceiling over a bed?
Okay, Subaru, what is going on? Are you living in some sort of entertaining prison?
Seriously though, Ryobi bits suck, but it might be able to get 4 holes. I think I know which clear case you're talking about. They don't have concrete bits in that box, only wood, metal and masonry.
The tapcon box should have come with a bit.
If you didn't use an oversized bit to drill the hole, your tapcons should hold pretty solidly. I'd only be worried about the concrete giving out. 12lbs is very little though.
You'll most definitively need a hammer drill
I want a larger screen size And for the ryobi bits I'm sure they are not great since it came with drill bits, screw bits and various drill sizes in a 30 pc case so you can only give so much for $16 or 20 I spent for it.
My current hammer drill is broken from the fall 11 ft off a ladder, it still runs but I don't think loctite epoxy is enough with the forward force to keep the body from snapping again.
It's NOT Ni-kon It's NE-KON!
LG is NOT Lifes Good It's Lucky Goldstar!