Finally, an affordable, raw VHO ballast for the DIY aquarist! This solid state electronic ballast has advanced Raid Start technology built into it. * ARO brand AS-220 VHO ballast, will power up to 220W or two 48" bulbs! This ballast will not run bulbs longer than 48". * Designed to power two VHO lamps. * Add additional supplemental lighting to your aquarium, or upgrade to Very High Output lighting for a fraction of the cost of purchasing a new system. * Highly efficient electronic ballast, no annoying hum like other magnetic ballasts. * Small compact design. * Wiring diagram on the ballast. * Model #AS-220. Do NOT use 60" or 72" bulbs, as this will fail the ballast and void warranty. * Warranty: 5 Years ARO AS-220 Ballast Specifications: Maximum Power: 220 Watts Maximum Current: 1.82 AMP (120vac) Operating Voltage: 120 VAC 10% Black, White Wires: 18" Long From Case Red, Blue, Yellow, Brown Wires: 18" Long From Case Ballast Case Size: Long Case - 9 3/4"L x 1 5/8"W x 1 1/8"H Ballast Weight: 18.5 OZ High Power Factor: > .90 Ballast Min. Operating Temp.: -20 F (-30 C) Ballast Maximum case Temp. : 158 F (70 C) Ballast Lamp Starting Mode: Raid Start (better than Instant Start for the bulbs) Class P (Thermal) Sound Rating - A End of Life Protection: No EOL Circuit