Twin Dimmable Ballast for controlling 2 x 14 Watt T5 Fluorescent Lamps. This High frequency HE Ballast offers many benefits including automatic restart once the lamp has been changed and end of life shut down. This is a slim and lightweight control gear measuring 21mm x 460mm x 30mm (h x l x w) boasting a 50000 hour service life. Offering a 60% reduction in energy consumption compared to a conventional ballast this is a popular choice in offices supermarkets public buildings and educational establishments.