The Hi-Tech Lamps part number CF9S/841-U is a 9 watt (9W) single tube compact fluorescent lamp made by Ushio. It has a maximum overall length of 168mm with a G23 two pin CFL 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 standard CFL ballast. This lamp is also known as Ushio CF9S/841 and 3000067.