Industrial Lighting Solutions S810RLCOMPUV1 Sterilight S810Rl Premium Compatible UV Lamp, 31.89" x 0.59" x 0.59" Effective hours rating: 10,000 hrs. ultraviolet germicidal light bulb For 8-25 gallon per minute units Used in the s8q-pa, s8q-pa/2 s8q, s8q/2 s8q-gold, s8q-gold/2 ssm-37, ssm37/2 10,000 hour long life lamp Length: approx.: 31.25