Powerplant Slimline Digital Ballast [600W] (This Powerplant digital ballast features four levels of dimming – 250W, 400W, 600W, and 660W to accommodate for different stages of plant growth. It is a solid performer for its small size (25 x 10 x 7cm high and 1.5kg) and has no moving parts (fans) so it runs silently).
