These LED lamps make an energy-efficient replacement and substitute for standard 150 watt incandescent lamps. At 10 watts, each bulb emits the bright light output of 2600 lumens These LED light bulbs have a Color temperature of 5000 kelvin, which produces a daylight white Color. This bulb is perfect for your nightstand, living room, or dining room These a21 bulbs have no warm-up time. When you flip the switch, it lights up instantly with a full 800 lumens of brightness and a stable daylight Color case of 4 LED light bulbs 50/100/150 watt equivalent using only 10/15/23 watts 800/1600/2600 lumens Indoor/Outdoor Non-dimmable