A ballast is essential to safely run HID lighting. The basic function of the ballast is to regulate the power that your lamp can draw which is why you need to match the wattage of your grow lamp to the wattage of the ballast. Ballasts are available in two types: Standard Ballast which have been around for decades and feature copper wire coils to regulate the wattage.
Digital Ballasts which use circuit boards to regulate the wattage and are more electrically efficient. When selecting your ballast - HydroHobby have a selection to meet all budgets and requirements from top brands Lumatek and Maxibright - offering dimmable light output settings so you can change your light intensity for different stages of plant development. Our Grow Light Ballast's are available in 250, 400, 600 and 1000 watt versions.