The 4 in. Daylight (5000K) Ecosmart LED downlight is an easy way to upgrade your existing can lights to the sleek look of recessed lighting and LED energy efficient technology. These lights are equipped with an medium (E26) screw in base, meaning they are easily retrofitted to your existing can lights. These LED downlights are fully dimmable and compatible with most LED dimmer switches. ENERGY STAR rated, these bulbs are estimated to cost only $1.08 to operate each year. Furthermore, these bulbs are expected to last for up to 35,000 hours of use. These LED downlights use only 9-Watt of energy, but produce brightness similar to a 60-Watt incandescent light bulb.