The Powerhouse is packed with features which make it the most advanced HID ballast enclosure on the market. With its durable all-aluminum exterior construction and its offset high/low component orientation, it runs quieter and cooler than any other ballast we have ever made. Cool components mean higher performance and longer life, which we guarantee with an 8 year warranty - the longest in the industry. Ballast Size: 11.5" (13.5" w/handle) x 7.5" x 8.5"