Comment Re:Red lights (Score 1) 315
I always believed the color of lights in the photo labs has something to do with the insensitivity of the photo paper.
Red lights help with not destroying your night vision and regards photo labs red lights are used when developing/handling black and white photos as the paper and negatives are not affected by the red light, but when developing/handling colour film it has to be done with the paper/negatives kept in complete darkness.