Keystone High-Output Fluorescent Ballast 1–4 Lamps

Operates 1 to 4 F54T5HO lamps (also supports 55W/50W 2G11, 36W 2G11, and F58T8)

Program-start with normal ballast factor for reliable lamp ignition and stable output

Universal input voltage: 120–277 V, suitable for commercial and industrial installations

High power factor (HPF) construction ensures efficient electrical performance

Minimum start temperature: –20 °C, good for low-temperature environments

Backed by a 5-year warranty from Keystone for product assurance