High quality, robust HID Electronic Indoor Ballast for optimal and reliable performance of 20 to 70W CDM lamps. The ballast offers optimal lamp performance thanks to minimal lamp power tolerance, CDM lamp life increased by up to 30%, eliminates all visible lamp flicker. It features minimal lamp power spread, low gear energy losses, lamp end-of-life detection, high Tambient and Tcase temperatures and 40,000 hours long lifetime.