I passed a motel offering "Black Light Rooms? Do you know what this means?

Answer 1

The only think I can think of is ultraviolet lighting. Was a big fad during the late 60's and 70's. Ultraviolet lights make florescent colors glow also gives off this purple haze look to everything else. Great for partying but beware if improperly shielded ultraviolet light is very hard on the eyes.

Answer 2

They have black lights in the room. It's kind of a love hotel thing. Would never be a favourite with junkies!