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Fulham WorkHorse 2 Electronic Instant Start Ballast 120V, Long Case

SKU: WH2-120-L | Ordering Code: WH2-120-L  | UPC: 872180100050

$17.99 per Ballast
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  • Ignites up to two 4-Pin/T5/T8/T10/T5HO/Circline/T12 lamps

Fulham Brand WorkHorse 2 Electronic Ballast, 120 Volt, with Leads. Ten ballasts operate 132 lamps in 860 combinations.  Ballast Lamp Starting Mode:  Instant Start

WH2-120-L Fluorescent Ballast Ignites:

  • Quad:  One or Two 10W & 13W, One 18W & 26W
  • Triple:  One 13W - 32W
  • Triple:  Two 13W
  • 2-D:  One or Two 10W, One 16W - 28W
  • Circline:  One 20W - 22W 
  • T5 Circline:  One 22W
  • T5 Linear:  One F4 - F35, Two F4 - F21 
  • T5HO:  One F24 
  • T12 Linear:  One F14 - F20
  • T6 Linear:  One F42
  • T8 Linear:  One F13 - F32
Full Specs



Input Volts


Input Watts


Number of Lamps


Ballast Factor

The percentage of a lamp's rated lumen output that can be expected when operated on a specific commercially available ballast. For example, a ballast with a ballast factor of 0.93 will result in the lamps emitting 93% of their rated lumen output. A ballast with a lower ballast factor results in less light output and also generally consumes less power.
Ballast Factor
0.5 - 1.2

Ballast Type

Magnetic ballasts are a legacy technology and use inductance to transform the line voltage to the voltage required to "fire" or excite the gasses in a lamp. Electronic ballasts use a variety of starting methods, and are more efficient than magnetic ballasts in converting input power to the proper lamp power and operate fluorescent lamps at higher frequencies, resulting in an overall lamp-ballast system – increasing efficacy 15% to 20% over a magnetic equivalent.
Ballast Type

Length (in)

Also referred to as "Maximum Overall Length" (MOL). For light bulbs, it measures the length of a light bulb, from the top of the bulb to the bottom of the base or pins and is typically expressed in inches. For light fixtures and ballasts, it applies to the total horizontal length of the item.
Length (in)

Width (in)

For fixtures and ballasts, width is the measurement of the total horizontal distance from left to right of the product in inches.
Width (in)

Height (in)

For ballasts and fixtures, height is the measurement of total vertical distance from the top of the product to the bottom expressed in inches.
Height (in)

Power Factor


Total Harmonic Distortion (THD)

Total harmonic distortion, or THD, is the measure of how much a ballast can distort the waveform of that building’s power supply and interfere with other equipment. Electronic ballasts today are rated at less than 20 percent, 15 percent, or less than 10 percent THD. The magnetic ballast is rated in the 20 to 28 percent range. The lower the THD the better and more efficient the ballast, and the less likely it is to interfere with other electronic equipment.
Total Harmonic Distortion (THD)

Lamps by Wattage

1x04W-35W, 2x04W-21W


5 years

Ballast Lamp Type

The type of bulb the ballast can fire.
Ballast Lamp Type

Maximum Current (Amps)

The maximum amount of Amps that a ballast can hold.
Maximum Current (Amps)

Maximum Load (Watts)

The maximum power that a product can handle.
Maximum Load (Watts)

Start Type

For Ballasts, indicates the method the ballast uses to start its bulbs. HID ballasts can be Probe or Pulse start. Fluorescent ballasts can be Rapid, Instant or Programmed start. For HID and Fluorescent bulbs, indicates the start-type of ballast that the bulb will work with.
Start Type
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Customer Reviews


by PowerReviews
Fulham WorkHorse 2 Electronic Instant Start Ballast 120V, Long Case

(based on 1 review)

Reviewed by 1 customer

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By JazzDad

From South Central Texas

About Me Casual Do-It-Yourselfer

Verified Reviewer


  • Easy To Install


    Best Uses

    • Repair or replacement

    Comments about Fulham WorkHorse 2 Electronic Instant Start Ballast 120V, Long Case:

    The old ballasts I replaced came from China, and one half of each ballast had gone out. These Fulham Workhorse ballasts fit PERFECTLY, down to the same hole size and spacing. The installation (wiring) of these new electronic ballasts were much less complicated than the original magnetic ballasts' wiring. I used Fulham's web tool to assist me:

    I am extremely pleased with the amount of light in my kitchen, now that all of the under cabinet lights are working again. made it a one-stop shopping experience, as I was able to get all of my replacement fluorescent lamps, too.

    • Primary use:
    • Personal

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    Q & A