I don't have this with bright light; that makes me uncomfortable, and I sometimes want to wince at it. But I may still experience what you're describing from other stimuli. For example, crowds don't always make me uncomfortable, but the excess sensory input from cross-talking can make it hard to focus or think, and have the effect of making me unable to take things seriously.

On the other hand, certain kinds of music can have a hypnotizing effect, and make me absolutely focused on whatever task I'm in the middle of. Though I consider that more beneficial, as it helps me get through schoolwork and some "adulting". It doesn't make me completely shut down or anything like that.

I have this! Strobe lights in particular make me totally zone out.

I've never really realized this, but flashing lights are hypnotizing. It's like I can't stop looking at them, and my brain goes into screensaver mode.

They're enjoyable and tiring at same time for me, the less bright the better

Count yourself lucky. Worst case is you get addicted to flashing light