12mm to 21mm and power is from 45w to 240w. It is mainly applied to industrial use and commercial use. It can directly replace high-voltage mercury lamp, high pressure sodium lamp and T8 fluorescent lamp.
FeaturesThe light effect is 5 times larger than incandescent lamp. Average longevity can achieve 8000 hours. 4U energy saving light bulb could save 80% energy compared with common incandescent lamps. This product enjoys soft light, small size, economical price. It can match any tube light. We have various colors here for your different uses.