The Hi-Tech Lamps part number CF42TE/841A-U is a 42 watt (42W) triple tube compact fluorescent lamp made by Ushio. It has a maximum overall length of 168mm with a GX24q-4 four pin CFL base. The average lifetime is 10000 hours, it has a color temperature of 4100 Kelvin (4100K), with a nominal luminous flux of 3200 lumens (3200 lm). It is intended for operation using a electronic ballast. This lamp is also known as Ushio CF42TE/841A and 3000537.