The Hi-Tech Lamps part number CF18CLT2700-U is a 18 watt (18W) coiled compact fluorescent lamp made by Ushio.This lamp has maximum overall length of 114mm and a diameter of 53mm The average lifetime is 10000 hours with a much longer typical lifetime in commercial environments. This lamp has a warm white color temperature of 2700 Kelvin (2700K), and has an output of approximately 1100 lumens (1100 lm). This lamp is also known as Ushio CF18CLT/2700/E26 and 3000553. This 18W CFL is an ENERGY STAR?? Qualified Product.