Lennox Genuine OEM UV-A Lamp X8149 for Lennox PUREAIR Models: PCO-12C (Takes 4 Lamps), PC0-20C (Takes 6 Lamps) Replaces 10M35. This bulb is compatible with New MERV 16 Filter.
PLEASE NOTE: Do not touch bulbs with bare hands, use gloves to install the bulbs. Oils from your hands can affect the performance of the bulbs.