Summary With SONOFF bulbs, you can replace the old, inefficient bulb with a new, intelligent one without having to replace the light and socket entirely. The new lightbulb supports multiple colors and can be adjusted to suit the surroundings. Simply turn it to blue to feel cold or red to feel warm. Details B05-BL-A60 is the model. C CT: 2700K–6500K 9W of power rating CRI: ≥Ra80 Bright Flux: 806 Lumens Type of Base: E27 Wi-Fi: Software Frameworks 230V AC 50Hz is the input. Size: 60 x 60 x 112 mm