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Quantum 400 Watt Dimmable Ballast

Item #: QT400

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What's Included

  • 240v cord
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Quantum 400 Watt Dimmable Ballast

Additional Images

Reflector Plug Type

This grow light ballast connects to a grow light reflector using the 'standard' plug type. Pair this item with Sun System, Solistek, Powerbox or any other brand that has this same graphic. Adapters are also available to allow for universal fitment between products. Learn more about reflector cord types


Ballast Type
Watt Output


Power Input
Cord Included

8ft 120V

8ft 240V

3 Year

Quantum 400W Dimmable Ballast

The Quantum Dimmable Ballast brings quality, efficiency, and high intensity illumination to your garden. With a Power Factor of 99.9%—a highly stable output frequency—the Quantum Dimmable ballast lets you run your lamps at the strength you need allowing you to control your light spread. Rigorously engineered, it features a resin cased circuit board with a sealed bearing fan so it will run cooler than any other ballast and it’s been tested to withstand the extreme atmospheric conditions of virtually any growing environment. The Quantum Dimmable Ballast is silent, generator-ready, efficient, and cool-running—this is one cool ballast.

  • Run at 100%, 75% or 50% power (400W runs at 100% and 75%)
  • Strike both metal halide and high pressure sodium bulbs
  • Accepts 120V/240V with no wiring needed (both cords included); 208V-configurable with electrician assistance
  • Accepts 50 Hz to 60 Hz with no extra wiring needed
  • Runs 15% cooler than other digital ballasts on the market
  • Has a continuous power factor of 99%
  • The most stable output frequency of any ballast
  • Higher lumen output than magnetic ballasts
  • Can run efficiently on generators without flickering
  • Resin sealed circuit board for high humidity installations
  • Can easily be used in conjunction with lighting controllers and flip boxes



Ballast Type Digital Ballast
Double Ended Optimized No
Dimmable Yes
Voltage 120/240V
Brand Quantum
Weight (lb.) 6.2
Length (in.) 13
Width (in.) 7.1
Height (in.) 3.15
Free Shipping Yes
What's Included
  • 240v cord

Shipping Info:

Free Shipping

Ships Via FedEx/UPS

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