400w sodium lamp: Design:American Standard. Watt:70W-400W Bulb Shape:Tubular and Clear. Watt:70w-400wBase:E27/E40 Glass and Porcelain BaseCharacteristic:high effective Energy saving,Long service life,good Photochromism and Light source,High luminous effciency.Applicatioin:Available for the facade,billboard,shop windows,sports event,indoor and outdoor deco lighting. high pressure sodium lamp