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The LED Authority

Universal Core and Coil Ballast Kit for 400W Metal Halide Lamp 120V to 480V

SKU: M400ML5AC4M500K | Ordering Code: M400ML5AC4M500K  | UPC: 768386172277

$79.99 per Ballast
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Universal HID MULTI-5 Core & Coil Ballast Kit* Ignites One 400 Watt Metal Halide (ANSI Code M59) or One 400 Watt Mercury Vapor (ANSI Code H33) Lamp of 120/208/240/277/480 Voltage. LAMP NOT INCLUDED.

Full Specs



Input Volts


Input Watts


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


Lamps by Wattage


Ballast Lamp Type

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

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

Ballast Code

The ANSI (American National Standards Institute) code that the ballast conforms to. For HID bulbs, indicates that the bulb is compatible with ballasts that conform to that standard.
Ballast Code
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Customer Reviews

Great price and FAST delivery.


What we needed and In Stock




dont let the price fool you


I replaced old HPS with this MH 400 to 400 so much brighter and a true white light




Universal Core and Coil Ballast Kit for 400W Metal Halide Lamp 120V to 480V

5.0 2


Q & A
What is the life expectancy of the ballast, is it the same as the light?


A typically life expectancy on an HID ballast is 10+ years. However, the life of a ballast can be based on a number of factors including # of On/Off cycles, Length of On time, Heat, Humidity/Dampness/Corrosion, Air quality (i.e. dust/dirt/salinity) or vibration.


Is it possible to remote mount the ballast 50ft away from the bulb?

Billy dodds

This particular ballast can be remotely mounted at various distances depending on the grade of wire used with the ballast (12GA = 132', 14GA = 83', 16GA = 52' and 18GA = 33'). It may be best to choose the 14GA wire in this case to make sure that the ballast will work from 50' away.

Product Support