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The LED Authority

Universal Magnetic Sign Ballast for High Output T12 Lamps

SKU: USB-2036-46 | Ordering Code: USB-2036-46 (DISC Use ESB848-46)

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  • Ignites up to six T12 lamps
Universal Magnetic Rapid Start Sign Ballast for 4-6 Lamp High Output T12 Fluorescent Lamp Circuits of 20-Feet (Minimum) to 36-Feet (Maximum) Total Length & 120 Voltage. Number of Lamps, Lamp Watts, and Lamp Lengths Vary by Application. LAMPS NOT INCLUDED.
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

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)

Ballast Lamp Type

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

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2 Questions | 2 Answers
Displaying questions 1-2
  • Q:

    will this ballast carry four f96t12 H/o bulbs
    Asked on 6/13/2011 by Anderson from bishop calif.

    1 answer



      This ballast will operate four 96" T12/HO lamps. The input watts are 480 for this ballast and it will be close running the four F96T12/HO lamps. We would recommend using a sign ballast for 20-48' total lamp footage. The input watts is 600. This ballast can be found using the following link.

      Answered on 6/14/2011 by Product Support from
  • Q:

    What is the bulb schematic diagram look like I need to replace a ballast that runs 4/t12/ 96" ho bulbs in a sign??
    Asked on 11/4/2010 by hiswillc from east coast area

    1 answer

    • Staff Reviewer


      Here are two links that will help. The first is a link to some popular 4-lamp F96T12 HO sign ballasts from Universal on the site. The second link points to a pdf file on the Universal site that contains the wiring diagram for the ballasts (in the future we plan to include links to manufacturer spec sheets directly from our site). If these two links don’t provide the information you require, please contact a Lighting Specialist at (888) 455-2800. sign ballasts

      Universal spec sheets and wiring diagrams

      Answered on 11/4/2010 by Product Support from
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