Lennox Healthy Climate Y0391 replacement Ultra-Violet lamp for the UVC 41W-S and UVC 41W-D . Lennox recommends this bulb be changed annually for best results.

UVC-41W-S takes 1 bulb
UVC-41W-D takes 2 bulbs

• 41 Watt Bulb
• 16" Long
• 110/230V 
• 4-Pin Bulb with Green Tip