Which Way Should Vanity Lights Face . Use about 3000 lumens of light. Stand directly in front of your light. Three Posts™ Nalani 3Light Dimmable LED Vanity Light & Reviews Wayfair from www.wayfair.com Traditionally edison bulbs have a distinctive tapered bulb shape, usually with a visible coiled filament in the center. The association also recommends placing the fixtures 28 to 30 inches apart, but that depends on the size of the room, among other factors. Don’t stand directly underneath it.