If you are a food enthusiast that likes to grow your own fresh herbs but don't have room in your yard to do so, give indoor gardening a try. Gotham Hydroponics offers a full line of switchable dimmable HPS/MH digital ballasts for an affordable price ranging from 250 watts to 1000 watts. These ballasts are high quality and come with a 3 year bumper to bumper warranty not to mention they produce 30% more light than a core and coil ballast and less heat. I've been using revolt ballasts for the past few years and they have turned out to be a solid investment and addition to my culinary creations.

http://www.gothamhydroponics.com/grow-lights/ballasts/hps-mh-switchable-ballasts/1000w-digital-ballast-revolt.html