An epoxy-silicone mixed resin composition comprising (A) an organopolysiloxane having at least one vinyl or allyl group and at least one hydroxyl group, (B) an organic resin having at least one epoxy group, (C) an organohydrogenpolysiloxane, (D) a platinum group metal-based catalyst, (E) an aluminum compound, and (F) 0.1-15% by weight of an organic mold release agent is molded and cured in a metal mold into a transparent product which can be smoothly removed from the mold. The cured product has a satisfactory bond strength to metal frames and maintains heat resistance. LED devices can be fabricated by continuous mechanical molding.