Keri’s newly developed LED big bulb series offer four types of wattage: 20W, 30W, 40W and 60W. With CRI>80 and delivered lumens per watt up to 90Lm, unique designed fast dissipated heat sink. Keri’s LED big bulbs go with E26, E39 base that makes these bulbs very easy to replace HPS, MH existing light systems. They can be used in warehousing, manufacturing, gymnasiums, convention centers and other large indoor spaces.