Philips T12 fluorescent lamps provide high performance in a wide range of sizes, shapes, and types. F84T12 D HO ALTO 1LP - 100 Watt - T12 Linear Fluorescent Tube - Base Information: Green Base - Bulb Shape T12 - Bulb Type F84T12 - Base Type: R17d [Recessed Double Contact Bay (RDC Bay-Fluorescent)] - Color Temperature: 6500 Kelvin - CRI 79 - Length: 84 Inch. - Life Hours: 12000 - Lumens Initial: 6625 - Lumens Mean: 6000 - Mercury (Hg) Content: 6.8 mg