These Royal Designs silk-wrapped dimmable LED Edison bulbs have a great mix of vintage look with modern LED technology. Can be used indoor and/or outdoors. Perfect for dinning rooms, bars, bedrooms, etc. TECH. INFO. – Dimmable LED Chandelier Bulb, E12 Candelabra Base, AC 130V with Over Temperature Protection. The BEST dimmer is the Royal Designs FD-2001-BLK. BULB SHAPE – Torpedo EFFICIENCY – Replaces 40W Incandescent Bulb with a 4W LED Bulb and could save you up to 90% on your Electric Bill ECO-FRIENDLY LED BULBS – Ultra-thin Silk-Wrapped Glass that Produces a Soft Light, Mercury-free, FCC and UL Compliant Add a vintage, yet traditional flare to any room with our Silk-wrapped LED light bulbs!