C by GE 44303 A19 C-Sleep Smart LED Light Bulb by GE Lighting, 1-Pack C-sleep creates the perfect bedroom light  warm and calm at night, crisp and vibrant in the morning Rated to last 20 years based on three hours use per day, provides same light output as 60-watt incandescent bulb Bluetooth enabled, no hub required C by GE app makes it simple for users to control their c-life and c-sleep bulbs from their smart phones, getting light thats right for every moment of the day Sync c-sleep bulbs to transition through three settings PM" for warm light, AM" for crisp light, and day for regular light