Bring sparkle and elegance to your Christmas lights with these silver glitter bubble lights. The diamond shaped and faceted candelabra base houses a 5-watt incandescent bulb creating both heat and light to bubble the liquid within the frosted tube. A light tap will get any slow starters going. For over 70 years, this novel invention has graced Christmas trees, garlands, and centerpieces. These decorative bulbs come 3 to a pack and must be used only in an upright position. UL listed for indoor/outdoor use. These bulbs make a dramatic statement when used in any lighting display. UL listed for indoor/outdoor use.