I’ve replaced many of the light bulbs in the house with full spectrum bulbs that actually emit white light (or darn near close) compared to the warm yellow glow of the current compact fluorescent bulbs.  During the day, they were fine as they melded nicely with the natural light, once the sun went down, I was ordered to remove them as, my dad, not being home while the sun was up, could now see the extent of the cigarettes stains on the kitchen walls.  The yellow bulbs returned and the stains disappeared into their nicotine-soaked soaked surroundings.  If they get really bad, I suppose I’m going to have to find a brown lightbulb.