TMC PROCLEAR 55WATT (1 X55 WATT LAMP. POND UV ELECTRONIC BALLAST FOR 1 X 55 WATT ULTRA VIOLET LAMPS IF A REPLACED ULTRA VIOLET BULB IS NOT WORKING,THE BALLAST IS THE MOST PROBABLE CAUSE OF A LAMP FAILING TO IGNITE . EASY DIY REPAIR.THIS IS AN ELECTRONIC BALLAST AND WILL OPERATE 1 X55 WATT T8 UV LAMP . Units occasionally show cosmetic wear and markings due to storage but are unused ! Older versions of this UV clarifier use a magnetic wire wound ballast which is usually marked at 58 watts , it’s a heavy metal ballast which can be supplied upon request, if unsure about whether it’s magnetic or electronic, just ask or send us a photo of your current ballast installed inside the unit
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