... is less than 1‰ per 1,000 hours.5.Long lifespan:30000-50000 hours , longer than most of lamps in LED market.6.Advanced ... and exhibition etc. About us:1. Huizhou Hi-zealed Electronic Co.,Ltd is a high-tech LED lighting enterprise,which combines research,development ... ,ISO9001:2008, if you need more cetification, please contact us.4.Any more questions , please email us or contact us online ...