NOVELTY - Silicone resin composition (I) comprises: (A) 100 parts by mass of an organopolysiloxane (II) having a weight average molecular weight of 500-20000, reduced to polystyrene; (B) 3-200 parts by mass of a white pigment; (C) 400-1000 parts by mass of an inorganic filler other than the white pigment; (D) 0.01-10 parts by mass of a condensation catalyst; (E) 1-10 parts by mass of an epoxy resin, which is a derivative of isocyanuric acid; (F) 2-50 parts by mass of an organopolysiloxane; and (G) 2-50 parts by mass of a linear diorganopolysiloxane (III).    USE - (I) is useful for molding a pre-molded package (claimed) for white, blue, or UV LED as well as for a packaging material for solar cells, and for optical semiconductor devices as indicators or light sources.    ADVANTAGE - (I) has good moldability and heat and light resistances, preferably against UV ray.    DETAILED DESCRIPTION - Silicone resin composition (I) comprises: (A) 100 parts by mass of an organopolysiloxane having a weight average molecular weight of 500-20000, reduced to polystyrene, and represented by the average composition of formula (CH3)aSi(OR1)b(OH)eO(4-a-b-c)/2 (II); (B) 3-200 parts by mass of a white pigment; (C) 400-1000 parts by mass of an inorganic filler other than the white pigment; (D) 0.01-10 parts by mass of a condensation catalyst; (E) 1-10 parts by mass of an epoxy resin, which is a derivative of isocyanuric acid; (F) 2-50 parts by mass of an organopolysiloxane comprising structure unit of formulae (R2SiO) (Ia) and (RSiO(1.5) (Ib)), where at least a part of the unit (Ia) repeats itself in series and the number of the repetition is 5-100, and 0.5-10 mol.% of the siloxane units comprising (Ia) and (Ib) has a silanol group; and (G) 2-50 parts by mass of a linear diorganopolysiloxane of formula (H3CO-Si(-OCH3)(-OCH3)-O-(Si(-R5)(R6)-O)n-Si(-OCH3)(-OCH3)-OCH3) (III).    R1 = 1-4C monovalent hydrocarbon;    R = OH, methyl, ethyl, propyl, cyclohexyl, phenyl, vinyl or allyl;    a = 0.8-1.5;    b = 0=0.3;    c = 0.001-0.5; and    a+b+c = 0.801-2;    R5, R6 = 1-3C alkyl, cyclohexyl, vinyl, phenyl or allyl; and    n = 800-1200.