Spectromaster Dimerabile Digital Ballast 600W Spectromaster 600w Digital Ballast | Products \ Power Supplies Products \ Power Supplies | Maxgrowshop.com
iPower 600 Watt Digital Dimmable Electronic Ballast for HPS MH Grow Light System Kits : Amazon.ca: Patio, Lawn & Garden
Lumatek Digital Ballast 600W, dimmable, 159,90 €
ACE Digital Ballast 600W - Grow King Hydroponics and Gardening Ltd