EEFL for lamphouse lenght:20-120CM High Energy Saving: every tube is 3-6W, can save 70% energy small volume: diameter 5-8mm EEFL for lamphouselenght:20-120CMHigh Energy Saving: every tube is 3-6W, can save 70% energysmall volume: diameter 5-8mm the link way: one ballast contect mian use for advertise, picture lamphouseUpdate Date:2011-6-2 19:56:03