Published at Tuesday, September 11th 2018, 08:03:29 AM by Glenna Richards. Bathroom Light. The bathroom vanity is where lighting needs to be the most strategic. We want to minimize unwanted shadows and be able to have full frontal illumination while looking at ourselves in the mirror. We should be able to see clearly what we're trying to tweeze and crimp while up against the mirror. Lighting coming in from the side from a wall sconce coupled with modern bathroom vanity lighting totaling at least 150 to 250 watts is usually adequate. With lighting mounted directly above the mirror, there should be some additional reflected light from the mirror that will even out the light. It's always good to start the day off feeling positive about the way we look and balanced, reasonably strong bathroom lighting goes a long way in helping us achieve this.