An arrangement utilizes diffractive, reflective andor refractive optical elements combined to intensify and homogenize electromagnetic energy, such as natural sunlight in the terrestrial environment, for purposes such as irradiating a target area with concentrated homogenized energy. A fuel spout extends from the body and is surrounded by an annular plastic socket assembly to define therebetween a vapor return passage. First and second coils are arranged concentric with the magnet on respective axially opposite sides thereof. Using mold inserts in this manner eliminates the need for secondary machining processes on the inner andor outer surfaces of the grooved seals, thereby reducing overall manufacturing costs and time as well as providing greater consistency and repeatability between manufactured grooved seals. In gap portions between the magnetic tracks located adjacent to each other in the radial direction, discrete portions for magnetically separating the adjacent magnetic tracks are formed, respectively.