system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Is it bad to turn off the lights and then turn it on again, or is that just as energetically favorable as leaving them on?

I'm talking about like if I'm leaving a room and turn off the lights, then someone comes in the room 5 seconds later and turns them on?  Or a similar situation but with a tv?
gpt
Turning the lights off uses no power. Turning them on uses almost no power, except for some fluorescent models where it can use up to 30 seconds of power.

Short answer: turn them off, especially if you're likely to be gone for much more than a minute.