Glass Beaded Bulb Cover, for standard sized light bulbs. This classic early lighting accoutrement was used to hide naked light bulbs on the early electric fixtures that were not able to accommodate a glass or fabric shade. Made of polished glass beads, these sleeve over light bulbs to diffuse the light. Darker colors will reduce light emissions. Several colors available. Blue. These bulb covers are usually in stock at our Rochester, NY location and can be shipped out in 24 hours in most cases. If not in stock this item genereally ships out from our location in 7-10 days.