Quote Originally Posted by AKFROG View Post
I am talking about the incandescent red lights used in film dark rooms. I read some where that they can't see this type of light. Is this true?
It's not that they can't see it. Red lights don't interupt their day/night cycle. They can't see infrared light in which case neither can we. The red light we see isn't infrared. Different wave lengths between red light and infrared.