... Electronic Ballast for Lamphouse: 1. Voltage: 220V/50Hz 2. Power: 1x8W, 1x14W, 1x21W, 1x28W, 1x35W 3. Power Factor: 0.95 T5 Electronic Ballast for ... Lamphouse:1. T5 electronic ballast for T5 lamps, 220V/50Hz.2. Function of preheat ... . Especially applied to a group of lights fittings. T5 Electronic Ballast for Lamphouse