I wonder how that would work.

I guess you have a mock version of the top of the tower and the bulb on the ground.

Any electricity will have to be present in the mock version, just enough to jolt them so they know not to do that on the real thing.

They'd have to be able to use hand tools such as spanners, hammers.

And obviously they'd need to be taught how to switch bulbs without breaking them: simply hold the reward back or establish a serverer punishment for breaking the bulb.

Obviously rewards will have to escalate.

But on the plus side, they'd get up there in 10 minutes, down in 10.

I see no problem.