Perfecto Replacement Fluorescent Strip Light Replacement light fixture designed to work with Marineland Universal Fit or Recessed Full Hoods. Can also be used with glass or clear plastic canopies. Features: Made from high-impact polystyrene, making this durable and consumer friendly Textured surface will not show fingerprints Instant-start feature allows use of timers Top vents provide heat dissipation, and interior reflectors provide maximum light output into the aquarium Water-resistant rubber boots protect switches from corrosion Item Specifications: Size: 20 inch: Fits 20" hood, holds one 18" bulb, 15 watts; measures approximately 18"L 24 inch: Fits 24" hood, holds one 18" bulb, 15 watts; measures approximately 22"L 30 inch: Fits 30" hood, holds one 24" bulb, 17 watts; measures approximately 28"L