Some thoughts:
I think it comes down to access requirements.
Do you need to raise the lights from the display room, or really just from the garage side?
If from the display side, you probably do need an actuator, because you likely only want a nice clean switch, not
some ugly rope hanging out.
If from the garage side, while cool, seems like a waste of money, and yet more things to fail / corrode.
It would be in a possible high heat + high humidity location.
I like to watch them feed, so I would guess display side, but up to you.
Another note regarding the connection after looking at the drawing:
You probably want to run 4 lines, one from each corner of the light, up through pulleys.
Then, connect those together after the pulley, to one line, which then goes through your blocks/actuator.
The upside-down Y connection takes vertical space, so you cannot raise it as high, plus it can swing
around a lot more.
Unclear from the drawing, but if not already thought of: you will want several parts on your block if you do it by hand. Probably 4.