TCI BTLT 239 Multi-lamp multi-power linear electronic ballast 2x39W
Which light bulbs need a ballast?
Germicidal Lamp Ballast for Ultraviolet lamps | elc lamps online
Viribright 4 ft. 40-Watt Equivalent Ballast Bypass Daylight White (5000K) Linear Single End Power T8 LED Tube Light Bulb (10-Pack) 757280-12MC - The Home Depot
LED High Bay Retrofit Bulb - 80 Watt - 10,000 Lumens - 5000K Daylight - Replaces 250W Metal Halide