The Hi-Tech Lamps part number CF9SE/841-U is a 9 watt (9W) single tube compact fluorescent lamp made by Ushio. It has a maximum overall length of 145mm with a 2G7 four pin base. The average lifetime is 10000 hours, it has a color temperature of 4100 Kelvin (4100K), with a nominal luminous flux of 600 lumens (600 lm). It is intended for operation using a dimming electronic ballast. This lamp is also known as Ushio CF9SE/841 and 3000178.