Replacement Lamp Fits S5Q-PA, S5Q-PA/2, SSM-24, SSM-24/2, S5Q, S5Q/2, S5Q-GOLD, S5Q-GOLD/2 S463RL Standard replacement part number, includes set of o-rings Product Description To maintain the best performance and ensure proper treatment the UV lamp needs to be replaced every year. While the lamp may remain lit for some time, after 1 year intensity diminishes and treatment quality fades.