It should be placed 75 to 80 inches above the floor and, like all vanity lighting, contain at least 150 watts, ideally spread over a fixture that's at least 24 inches long so that the light will wash evenly over the hair and face.

The standard height of a bathroom vanity cabinet is 32 inches. Bathroom vanities range from 30 inches  to 36 inches in height. Modern bath cabinets have become taller in recent years in what is known as 'Comfort Height Vanities'.

It should be placed 75 to 80 inches above the floor and, like all vanity lighting, contain at least 150 watts — ideally spread over a fixture that's at least 24 inches long so that the light will wash evenly over the hair and face.