1.Saving energy 80% 2.Super ultra slim and professional 3.Competitive price,top quality 4 ... .Special size is ok 5.Long lifetime Ultra Slim Led light box specification: (1) Normal Size: ... silk prink frame, T4/5 OR LED lighting source. Ultra slim, four side open.(4) Long life time 60000HOURS, ... 3W-6W/light. Tianzhong ultra slim light box unit is based on the same ...