Direct replacement of the 16W Exun DD Fluorescent Lamps: When use with magnetic ballast, simply remove the starter before installation. If HF electronic ballast is used, the ballast need to be by-passed   Long Life of 30,000 hours , reduces maintenance cost significantly . Instant start, no flickering. Suitable for frequent switching, ideal to use with PIR/Sensor fittings. Save energy up to 65%, comparing with fluorescent DD lamps with magnetic ballast. Maintained emergency module is available