Re: light or not in light(for married couples)
Generalized stance:
Like most, I like to see what I am eating to satisfy the hunger for food. Hunger for sex is categorized same as hunger for food so it is only human and logical to see what you are satisfying your hunger for sex with.
Religious Stance:
The husband and wife can be naked in front of each other. However, Islam urges human beings to observe haya' or modesty.
Allah has called each spouse a garment for the other (2:187), and the purpose of garments is decency. (Subhan Allah)
RC