I'm not sure where you got this understanding from, but the LED lights I'm talking about (grow lights) are definitely bright enough to make your pupils shrink.

I'm not sure where you got this understanding from, but the LED lights I'm talking about (grow lights) are definitely bright enough to make your pupils shrink. > If you had a strong emitter of UV in a relatively dim room A 150 watt LED right above your head is the opposite of dim.