In a phosphor whose host crystal is constituted of an oxide, a method of preparing the phosphor where the oxygen deficiencies in the phosphor are not many, and a plasma display device using the same are provided. The arms provide for pitch changes of blades attached to the yoke through twisting of portions of the arms about a corresponding pitch axis. Either the device for outputting the binary current or the element for outputting the all-ON current of the binary current generator is selected according to a decode signal output by the decoder. The rear illuminated test elements comprise wide color gamut hues at levels of saturation not attainable in reflected light systems. Some embodiments include determining whether a first seller accepts the user requested price for the item and in response to a determination that the first seller accepts the user requested price, sending an offer to the user to purchase the item at the user requested price. The result is a lighting fixture having multiple degrees of rotation.