EVOLUTION AQUA EVO 110 WATT UV ELECTRONIC BALLAST IF A REPLACED ULTRA VIOLET BULB IS NOT WORKING,THE BALLAST IS THE MOST PROBABLE CAUSE OF LAMP FAILURE -EASY DIY REPAIR PLEASE NOTE WE SEND THE CORRECT SIZE BALLAST TO FIT THIS MODEL IF YOU HAVE AN OSRAM/ARLEN BALLAST ITS A FIRST GENERATION MODEL HOWEVER IF IT HAS AN ELT BALLAST ITS A CURRENT MODEL SO PLEASE ADVISE ON ORDERING WHICH ONE YOU HAVE ! PLEASE NOTE THAT THE BALLASTS MAY VARY IN MANUFACTURER DEPENDING ON STOCK AVAILABILITY
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