The Hi-Tech Lamps part number F28T8/841 -U is a 28 watt (28W) fluorescent tube lamp made by Ushio. This lamp has maximum overall length of 1219mm (48in). This lamp has an average lifetime of 24000 hours. It produces a color temperature of 4100 Kelvin (4100K) with a color rendering index (CRI) of 86 and an initial output of 2800 lumens. This lamp is also known as Ushio F28T8/841 and 3000485.