... -------------SpecificationsVoltage: 110V/220VPower type: 8w, 14w, 21w, 28w, 35w, 54w, 2*8w, 2*14w, 2*21W, 2*28w, 2*35w, 2*54w ... °C-50°C---------------Features & Benefits Of 14W T5 Electronic Ballast:1. Metal shell, with insulation protection layer,safe using, good looking.2 ... , input current and voltage protection ,extended the life of the fluorescent lamp.3. Super energy saver, PF: >0.98, THD<20 ...