Ballast for 2 F54T5HO Lamps 120-277V The Sylvania 51475 has push in connectors for easy replacement. This ballast will operate 1 or 2 lamps and is applicable in high temperature situations. These ballasts are specifically designed forapplications where the ballast is subjectedto higher ambient temperatures, as in highbay industrial installations.PENTRON T5HO lamps are designed toprovide peak performance at 35°C fixtureambient, allowing for smaller and moreinnovative fixtures.These systems are RoHS compliant andfeature lead-free solder, printed circuitboards and manufacturing process