... is designed to replace the traditional lamps. It can works when install it directly in the original ... obvioysly, very little facular.3, For traditional tubes, optical decay reached 20% after 200 hrs usage, but ... for Ervan led tube, optical decay is less than 2% after 1,000hrs usage ... a long time. Under a normal environment, the optical decay can keep within 8% after 30,000 hrs.4 ...