A method for manufacturing green-emitting phosphor particles including the steps of producing a powder containing europium and strontium from a solution containing a europium compound and a strontium compound, mixing the resulting powder and a powdered gallium compound, and performing firing. Each beacon also defining a plurality of tone masks, a contention access region, a contention free period, an inter router communication slot. Two ends of each of the two cords are outside the mesh bag. The front and rear portions of the hood may be coupled together via a hinge.