Keri’s LED T8 tubes consume just 8 to 30 watts of power, and are 2-feet, 4-feet and 8-feet long. With CRI>80 and delivered lumens per watt up to 110Lm. Keri’s T8 LED tubes are buzz and flicker free and will not contribute to headaches and eye fatigue that are associated with fluorescent fixtures. Keri’s T8 tubes can save up to 90 percentage energy, and can be deployed in homes, offices, high-ceiling warehouses and general areas.