Introducing the Royal Designs, Inc. Silk Wrapped LED Bulb 4-Watt E12 Candelabra Base 130V 2700K. Our innovative and stylish LED bulbs are perfect for any home or office decor. With a 6-pack of bulbs available for one low price, you can easily stock up on these energy-efficient and stylish bulbs. This 4 watt thread spun bulb has a satin finish that is created by spinning the bulb with a silk thread. Also known as a silk spun or a satin spun bulb. Thread spun bulbs produce a unique, warm, gas light effect, unlike flame tip bulbs, which display the filament glow.