The invention relates to a lamp system and a lighting apparatus. The lamp system 12 which can improve radiation performance is provided. A metallic heat conduction part (47a) provided along a peripheral portion of a metallic cover (32) is fitted with a resin heat conduction part (65a) provided along a peripheral portion of a transparent cover (35) so as to thermally contact each other. Heat generated by a LED (56) is radiated into air from the metallic cover and at the same time is efficiently conducted from the metallic cover to the transparent cover to be radiated into air from the transparent cover.