Unfiltered UV Blacklight Fluorescent Bulb Replacement

Have you noticed that your exposure is taking longer than normal? Exposure bulb's should be changed every 12-24 months depending on usage. Unfiltered UV blacklight fluorescent replacement bulbs for the Ranar exposure unitsor any unit using the T-12 configuration. These Unfiltered UV blacklight fluorescent bulbs come in two sizes 24" and 48". The manufacturer continuous use average life rating for this  bulb is 20000 hours