LSE Lighting 11W UV Bulb for Laguna PT-1500 PT-1502 Pressure-Flo UVC Filter Brand: LSE Lighting Wattage: 11W, Length: 8 3/4" Long Base: 4Pin (4pins on one End), Avg Life: 10,000hrs This replacement UV Lamp by LSE Lighting brand is 100% compatible to use with Laguna Pressure Filter PT-1500 and PT-1502. All UV lamps listed are compatible brand (LSE Lighting) UV products. We do not sell Laguna Hagen brand lamps. All Laguna Hagen brand names, trademarks and logos are property of Laguna Hagen respectfully.