T4 half spiral energy saving light 1.energy saving up to 80 ... ,high lumen 3.life up to 10,000hrs T4 half spiral energy saving lightFeatures:High light output and excellent color ... :12mmdiameter of whole tube:58mmdiameter of plastic:52mmlamp base:B22/E27lifetime:6,000/8,000/10,000hrscolor temperature:2 ... lamps, pendant lamps, supermarkets, restaurants, shops, hotels etc T4 half spiral energy saving light