they do make phosphor coated mercury vapor bulbs, raises the color from 5900k to 4000k (still not ideal, but quite a bit more red).
4x5 Reviewed by 4x5 on . Is this a good source of light? Im not sure if its any good. all i know is its used for tanning indoors, old school. Mercury Vapor lamp.. :confused: http://img178.imageshack.us/img178/8276/light8pw.jpg Rating: 5