Gph436t5l/4p/ho Germicidal / Uv Bulb replaces Aprilaire Lamp 1910, 1930, 90, 87N77, 1076R

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Gph436t5l/4p/ho replaces Aprilaire Lamp 1910,1930,90,87N77,1076R  The lamp is 48 watts and 436 mm in length, rated effective life 10,000 hrs., change once a year.