Energy Saving: 4 watt ST64/ST21 LED filament bulbs replacement 40 Watt incandescent bulbs, instantly save over 90% on electricity bill of lighting.
Multi-Function: They fit into either an E26 screw base which means they fit standard home lighting sockets as well as any pendant light fixtures and wall sconces, commercial string lights, ceiling fan lamps, chandeliers etc which use an E26 socket.
Installation: Standard E26 medium base, 4 LED filament, glass cover, not dimmable and install to easy
Bright and Safety: clear glass with high transmittance, mercury-free, no UV, CE and RoHS authenticate.
Extremely Long Life - Average 25000 hours lifespan, 20 years life (3 hours per day), 2 years warranty.