Industrial Lighting Solutions UVCS810RL Lamp for S8Q-PA, S8Q-PA/2 S8Q, S8Q/2 S8Q-GOLD, SSM-37, SSM37/2 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