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Rectangular electronic ballast unit with wiring terminals and label

Fulham

Fulham WH4-120-L 5-70W 1-2 Lamp Electronic Ballast

SKU CH-KJ7Z-2AC25

Powers one or two fluorescent lamps from 4 to 100 watts on a 120 volt supply with instant start down to minus 22 degrees Fahrenheit

  • TypeTraffic & Parking Lot
  • Operates one or two fluorescent lamps for flexible installation
  • Instant start delivers immediate light without flicker
  • Supports lamp wattages from 4 W to 100 W for broad compatibility
  • Works with multiple bulb types including T5, T8 and T12
  • Starts reliably down to -22 °F for cold environments

Electronic Ballast for Fluorescent Lamps

The Fulham WH4-120-L is an electronic fluorescent ballast designed to operate one or two lamps across a wide wattage range from 5 to 70 watts. It supports multiple bulb types including T5, T6, T8, T10, T12, BX and DBX variants. The unit runs on 120V AC input and uses instant start technology. It is intended for traffic and parking lot lighting installations.

Check Supply Voltage and Lamp Compatibility

Verify that the installation site provides a 120V AC supply before ordering. Confirm the lamp type and wattage fall within the supported range of 5 to 70 watts and match the listed bulb types such as T5, T8 or T12. This ballast does not support dimming functions. Ensure the ambient temperature does not drop below minus 22 degrees Fahrenheit for reliable starting.

Thermals Noise and Power Draw

The ballast operates with a minimum starting temperature of minus 22 degrees Fahrenheit, suitable for cold outdoor environments. Electronic circuitry typically runs silently without the audible hum associated with magnetic ballasts. Power consumption will vary depending on the number and wattage of lamps connected up to the 70 watt maximum. No cooling fan is present so heat dissipation relies on the metal housing.

Highlights

  • Operates one or two fluorescent lamps for flexible installation
  • Instant start delivers immediate light without flicker
  • Supports lamp wattages from 4 W to 100 W for broad compatibility
  • Works with multiple bulb types including T5, T8 and T12
  • Starts reliably down to -22 °F for cold environments

Specifications

BrandFULHAM
TypeTraffic & Parking Lot

Questions about this item

What comes with the Fulham WH4-120-L ballast and what must be purchased separately?

The unit is the electronic ballast only. You must buy compatible fluorescent lamps separately — supported types include BX, DBX, T10, T12, T12U, T5, T6, T8 and T8U in wattages from 4 W to 100 W.

Which lamp configuration should I choose for this ballast?

It operates one or two lamps on 120 V AC. Pick any combination of the listed bulb types and wattages (for example 13 W, 17 W, 32 W or 40 W) so long as the total lamp power stays within the 5–70 W range.

What does the 5–70 W rating mean once the ballast is installed?

It defines the total lamp wattage the ballast can drive. With one or two lamps connected, the combined wattage must fall between 5 W and 70 W, and the ballast will start them instantly down to –22 °F.

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