Fish & Aquatic Supplies 28Watt Compact Flo Actinic Square Pin Bulb 13" 28WATT COMPACT FLO ACTINIC SQUARE PIN BULB 13", 1 PACK, AQUARIUM, POWER COMPACT BULBS, CORALIFE (ENERGY SAVERS) CORALIFE (ENERGY SAVERS) 28WATT COMPACT FLO ACTINIC SQUARE PIN BULB 13" AQUARIUM