If I leave a light on in a room will they not enter the room?
no but uv light is harmful to them in high quantities
there's ALOT of way into your room that aren't lit anyay... not to try and sacre you but i bet they've already been in there.. scorpions aren't much of a threat anyway, there's only a few reported stings a year and hardly any are fatal
Sorry, but no. Light or no light, if they're hungry or threatened they'll go anywhere.