... the lower cover is for bulblamps storage,Using new cool power meter,could show:Power, current, voltage, power factor, ... also do the case according to your design1,Cool color watt meter 1 and 2 is more expensive,The ... fuction is the same,the difference is color meter 1 show all datas on one screen and ... by one on few screens.2,the white watt meter is cheaper,it just could show:power,curent,voltage ...