Varidrive Ballast

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The Varidrive dimmable ballast from Maxibright is a high-quality digital ballast with a 4-way dimmer switch, which gives you complete control over the power output to your plants. The ballast will power 250W, 400W or 600W HPS or Metal Halide bulbs and includes a boost mode that increases output to 660W, which can be beneficial during the flowering/fruiting phase. It is not recommended to dim or boost Metal Halide lamps as thus will affect the spectral output significantly. Be sure to pair the correct lamp to the output selected, so don't be tempted to run a 400W lamp at 250W for long-term use, for example. This will save energy and reduce temperatures as a short-term fix, but it is not advisable in the long term as your plants will not receive the full PAR (usable light) range. As with other digital ballasts, the Varidrive's soft-start feature will extend the life of your lamps by protecting the bulb from power surges and eliminating flicker. It also includes RF shielding, so it will not interfere with other electrical equipment in your home. The Varidrive 600w ballast comes with a 1-year guarantee. Show more