Get warm-to-cool white light with the ST72 bulb. Featuring an E27 base, coiled inner filament, instant dimming and the full suite of smart light features, this LED bulb brings old and new together.Lumen output at 4000K :550 lmWeight :59Bulb technology :LEDLumen output at 2,700 K (out-of-the-box setting) :550 lm