The Hi-Tech Lamps part number F39T5HO/835-U is a 39 watt (39W) fluorescent tube lamp made by Ushio. This lamp has maximum overall length of 863mm (34in). This lamp has an average lifetime of 20000 hours. It produces a color temperature of 3500 Kelvin (3500K) with a color rendering index (CRI) of 85 and an initial output of 3500 lumens. This lamp is also known as Ushio F39T5HO/835 and 3000464.