Filament Expansion Smart LED Light Bulb for WigWag Relay, Adjustable Warm to Cool Whites, Multicolor, Dimmable (Pack of 4) Transform your lighting with millions of colors and cool to warm whites. Control Filaments with rules, moods or your smartphone using the WigWag Relay Filament expansion bulbs need the WigWag Relay or Relay Lite (Sold Separately). Included: 4 bulbs, Body Shape: A19, Bulb Base: E26 medium Edison screw The Filament LED bulb (800 Lumens, 60-Watt equivalent) can deliver up to 80 percent energy savings and a lifespan of 30,000 hours (up to 20 years) Dimmable, easily programmable, works with existing wall switches, protected by 128-bit encryption, works even when you lose your Internet connection Control Filament bulbs, plus other compatible smart bulbs, switches and more; with WigWag Relay or Relay Lite (Sold Seperately).