Clear F15 Flame antique flame lights for chandeliers and sconces. Transparent Christmas lights radiate a bright glow, while nickel bases prevent corrosion for 3,000 hours of Indoor / Outdoor display. 40 watt incandescent 130 volt light bulbs shine brighter. E26 base is standard household lamp size. Screw into outdoor patio strings and hang over decks, patios, under arbors, etc.