LUMINAIRE COVER

PROBLEM TO BE SOLVED: To improve a shock resistance and light dispersion and to facilitate discharge of heat generated in an electric appliance so as to restrain a temperature increase therein by using a polyethylene resin composition in which an optical dispersing material is dispersed in a high density polyethylene. SOLUTION: This cover is formed by using a polyethylene resin composition in which a light dispersing material is dispersed in a high density polyethylene. As the light dispersing material, an inorganic compound such as an antimon trioxide, barium sulfide, titanium oxide, or an organic compound such as polybuthadien, polyisoprene, conjugate dien rubber is used. The dispersion quantity of the light dispersing material is preferably 0.5-10 wt.% to the polyethylene resin composite. The average diameter of the light dispersing material is preferably 1-10 μm. By blending a nucleation agent such as organic phosphoric acid metal salt into the polyethylene resin composite, the starting point of crystallization of polyethylene resin is increased to thereby generate a fine polymer crystallization part with an evenly finely arranged non-crystallization part.