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Magnetic Ballasts

Magnetic ballasts use the core and coil to create an electromagnetic field that regulates the voltage a high-intensity discharge (HID) light or compact fluorescent light receives so that the bulb doesn’t overheat and explode. Unlike its digital counterpart Magnetic ballasts can not be dimmed and can only output the voltage that goes in – no more, no less. Magnetic ballasts have been used by growers for years. Favoured among those on a budget, they are cheap to buy, and last a life time if treated with care.