FTC Lighting Facts label帮助您挑选灯泡! 2012-05-282013-08-17 • 能效 • 评论关闭 •2,135 Lumens FTC(联邦贸易委员会)宣传短片地址:http://www.ftc.gov/bcp/edu/microsites/lightbulbs/index.shtm