Ballast Dimensions: 80 Watt 120V: L= 8.39", W= 3.76", H= 2.28" 80 Watt 220V: L= 8.39", W= 3.76", H= 2.28" 80 Watt 277V: L= 8.39", W= 3.76", H= 2.28"
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