Galaxy Ballasts are distributed exclusively by Hawthorne Gardening Company to authorized retailers. All Galaxy ballasts are compatible with Sun System brand reflectors. Galaxy is proud to offer complete versatility with the cutting edge technology of the Galaxy DE ballasts and the reliability of Galaxy Commercial ballasts. Many years of engineering and manufacturing experience have gone into the successful development of Galaxy electronic ballasts. This state-of-the-art ballast is manufactured to provide today's serious grower with maximum flexibility and enduring performance.