Testimonials
Fast Shipping

I placed my order on the 7th and received it on the 10th. My floodlight is blazing once again, allowing me to take a midnight swim. Thanks HPS.
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Excellent Service

very good service, fastest delivery I have ever had. Would definitely recommend this bussiness to anyone.
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Great Service

I buy all my HPS Products from HighPressureSodium. They are extremely helpful and the products always ship the next day.
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400W HPS Ballasts

400 Watt High Pressure Sodium Replacement S51 Ballast Kit

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Product Image Item Name- Price

400 Watt HPS Sun System 10 Crop Master Remote Ballast - 902040

400 Watt HPS Sun System 10 Crop Master Remote Ballast - 902040

The 400W Sun System 10 Crop Master (formerly known as Eco Grow) plant is both economical and versatile for all your plant lighting, allowing you the option of operating at 120v or 240v power supply. 6ft 120V Power cord is included. (240V power cord is sold separately). Best of all, it includes FREE Shipping within the continental United States. 400W SS 10 HPS Horticulture Plant Ballast 5 Year Warranty Multi-volt...
$145.95

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400W HPS Ballast Multi-Tap Volt ANSI S51 Kit

400W HPS Ballast Multi-Tap Volt ANSI S51 Kit

We have a 100% Satisfaction and Price Guarantee on all our 400 Watt High Pressure Sodium Ballasts and 400 watt high pressure sodium bulbs. All our 400W sodium kits include ballast, high pressure sodium capicator, high pressure sodium igniter and mounting hardware. High pressure sodium lamps, sockets and power cords may purchase separately. 400W High Pressure Sodium Ballast Kit 400 Watt HPS Quick Ballast...
$74.95

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400W HPS Ballast 5 Tap 71A8453 S51 Kit - Value

400W HPS Ballast 5 Tap 71A8453 S51 Kit - Value

We have a 30 day satisfaction and price guarantee. All our 400W sodium 71A8453 kits include ballast, ignitor, capacitor and mounting hardware. All our replacement 71A8453-001D Value brand multi-tap ballast kits gives you the piece of mind with a 2 year warranty. Please see our entire selection of 400W high pressure sodium lamps and 400W high pressure sodium ballasts. 400 Watt High Pressure Sodium BHPS-400-5T...
$71.95

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400W HID Ballast Quad Tap HPS-400A-Q-KIT S51 - Keystone

400W HID Ballast Quad Tap HPS-400A-Q-KIT S51 - Keystone

Keystone utilizes sophisticated manufacturing and quality control processes to guarantee outstanding performance in the field. The Keystone HPS-400A-Q-KIT (formerly HPS-400A-Q-HP-KIT) Quad-Tap ballast is known for dependability and superior efficiency, Keystone’s high intensity discharge 400W HPS ANSI S51 multi-tap ballasts are perfectly suited for even the most demanding HID lighting applications. The replacement...
$81.95

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400W HID Ballast 5 Tap HPS-400A-P-KIT S51 - Keystone

400W HID Ballast 5 Tap HPS-400A-P-KIT S51 - Keystone

Keystone utilizes sophisticated manufacturing and quality control processes to guarantee outstanding performance in the field. The Keystone HPS-400A-P-KIT (formerly HPS-400A-P-HP-KIT) 5-Tap ballast is known for dependability and superior efficiency, Keystone’s high intensity discharge 400W HPS ANSI S51 five-tap ballasts are perfectly suited for even the most demanding HID lighting applications. The replacement kits...
$84.95

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400W HPS Ballast Quad Tap S400ML5AC4M S51 Kit - Universal

400W HPS Ballast Quad Tap S400ML5AC4M S51 Kit - Universal

Universal's 400W HPS replacement kits contain the appropriate core & coil, a properly rated capacitor, and all other components required for your ballast replacement. The Universal Lighting 400W S400MLTAC4M ANSI 50 Quad-Tap replacement ballast comes with brackets, ignitor, capacitor and screws. Universal 400 Watt S400MLTAC4M-500K replacement ballast kit comes pre-wired and color coded leads to reduce the risk of...
$87.95

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400W HPS Ballast 5 Tap S400ML5AC4M S51 Kit - Universal

400W HPS Ballast 5 Tap S400ML5AC4M S51 Kit - Universal

Universal's 400W HPS replacement kits contain the appropriate core & coil, a properly rated capacitor, and all other components required for your ballast replacement. The Universal Lighting 400W S400ML5AC4M ANSI 51 5-Tap replacement ballast comes with brackets, ignitor, capacitor and screws. Universal 400 Watt S400ML5AC4M-500K replacement ballast kit comes pre-wired and color coded leads to reduce the risk of...
$95.95

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Looking for a 400W HPS Ballast? You might be just setting up your lighting application or you might be trying to figure out a problem with your existing lighting fixture or grow light fixture. Well aside from the obvious need for these devices to fire up and operate the lamps, they also serve a very important purpose. These lamps can have certain symptoms indicating the bulbs need to be replaced. Sodium lamps are gas discharge lamps which use sodium in an excited state to generate light. The amount of power that goes into these lights must be regulated. This is done with a High Pressure Sodium Ballast. The kit contains a capacitor and a ignitor to input and regulate the required voltage to the bulb.


400 Watt High Pressure Sodium Ballasts are an excellent selection for the home lighting application for hobbyists, for testing purposes, and it is even used in outdoor applications which use 400 watt bulbs. Examining your lighting application will let you know what the number of watts the HID bulbs require. It is important to select the same watt rating on both the bulbs and ballasts. If you are still selecting your lighting application, here are some benefits to HPS 400 watt lighting kits.

  • Applications are small and easy to set up
  • High Lumens: 50,000
  • Inexpensive and versatile solution
  • Perfect for flowering/budding stages of plants

NOTE: 400 Watt High Pressure Sodium Ballast are rated specifically to your existing S51 Sodium bulbs only.