Switchable
Magnetic ballasts are the tried, true, and less expensive option for grow light ballasts. They come wattage specific i.e., 1000w, 600w, 400w, etc... (not dimmable), and can either run high pressure sodium (HPS), metal halide (MH), or both depending on their specifications--switchable ballasts can run both HPS and MH bulbs. Switchable ballasts allow you to have one ballast and switch your bulbs out from vegetative to flowering spectrums.
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SGLite 600w Convertible Ballast
$98.67MSRP:$118.40 -
PowerHouse Conv Aluminum 1000W (Sod/Hal)
$178.46MSRP:$209.95 -
EP BG 120/240V HPS/MH Ballast - 1000w
$117.46MSRP:$149.95 -
ValuGro 1000watt Switchable Ballast
$101.04MSRP:$139.95
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Crop Master Sun System 10 -- 1000w Switchable Ballast
$153.86MSRP:$182.95 -
Harvest Sun 1000w Switchable Ballast
$141.98MSRP:$194.95 -
Harvest Pro Ballasts --1000w Switchable Ballast
$162.68MSRP:$191.95 -
Powerhouse 1000W 120/240v Convertible (HPS/MH) Ballast
$224.00MSRP:$320.00
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