The Hi-Tech Lamps part number F54T5HO/841-U is a 54 watt (54W) fluorescent tube lamp made by Ushio. This lamp has maximum overall length of 1163mm (45.8in). This lamp has an average lifetime of 20000 hours. It produces a color temperature of 4100 Kelvin (4100K) with a color rendering index (CRI) of 85 and an initial output of 5000 lumens. This lamp is also known as Ushio F54T5HO/841 and 3000396.