Magnetic Ballasts

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When you want reliable quality, a magnetic Sun System Crop Master 600W HPS ballast is a good choice for years of trouble-free use.
The Sun System Hardcore switchable 1000-watt 120/240-volt ballast is compact in size and runs cool.
$209.95 - $259.95
When you say "grow lights" you mean Hydrofarm, and Hydrofarm grow lights mean business. Hydrofarm has been perfecting HID ballast design since 1977. The Hydrofarm Powerhouse ballast has evolved into one of the most durable brands on the market today.
Hydrofarm's Xtrasun ballasts give you reliable service at an affordable price.
If you are looking for an economical ballast, the 1000W Sunleaves Simple Two-way Ballast is a good choice.
The Sunleaves 1000W Two-way ballast features a common power outlet with 120/240-volt dual-voltage capabilities.
The Sunleaves 400W Two-way ballast powers either high pressure sodium (HPS) or metal halide (MH) lamps.