... how many lampholders you want,then we could do accordingly,with CE and RoHs certification. LED Portable sample Case,Portble LED Light Case,led ... to your design.1. Could compare the power consumption of the LED lamp with traditional lamp on the case. 2,. Could choose E27,B22 ... one by one on few screens.2,the white watt meter is cheaper,it just could show:power,curent,voltage. LED Test Case