A receptacle structure for a fluorescent lamp, wherein a light refracting plate is arched upwardly and is provided beneath two wing plates of an elongated base of the receptacle structure, the inner bottom face of the refracting plate is in an undulated form and is arched in a contrary direction to that of an arched and undulated lamp shade, thus an elliptical hermetic space is provided for hidding a lamp pipe (which is secured by two end fixing-seats provided on the two ends of the elongated base) between the lamp shade (which is engaged by two end fixing-caps for preventing it from dropping) and the refracting plate, thereby light projecting through the refracting plate and the lamp shade can be more uniform, the lamp pipe will no more be exposed to be covered with dust, appearance of the whole lamp can be more beautiful.
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