A blue light component emitted from a blue LED is reflected by a reflection member having a parabolic cross section and introduced into a Fresnel lens. The Fresnel lens contains fluorescent material substantially uniformly. The Fresnel lens transmits a part of the blue light component while converting the wavelength of a part of the blue light component. The wavelength conversion is performed as follows: the fluorescent material in the Fresnel lens is excited by the blue light component and the excited fluorescent material emits light containing a yellow light component. The yellow light component after the wavelength conversion is projected as a uniform light together with the blue light component by the Fresnel lens.