motion detector lights or camera?

looking to put something on corner of house, where the front light, is blocked.

seems a camera might scare people off more, but would like some lighting over there as well.

also, do key fob blockers work, like bags,etc? shite heads stole wifes signal off the fob last night and got into her car and looked for valuables, ended up just pulling everything out of arm wrest and left it on her seat. She leaves the fob, literally 1 foot from door, in a key basket. I told her, why not just leave keys on the outside screen door handle.