We will provide each lamps and lanterns 3 small sheet iron holders of ordinary ceiling lamp. If some one need . These 3 small sheet iron holders can fix tubes as the same as other ordinary ceiling lamp. First, we have few holes reserved on the chassis so that it can fix these small holders. Then make the ordinary electronic ballast installed with screw on the chassis .That’s all ! we also have few holes reserved to install electronic ballast on the chassis .