The R (Reflector) lamps are blown from soft glass and direct the light due to their shape and a partial mirror coating on the inside.

The PAR lamps are manufactured from pressed glass in order to achieve high resistance to temperature change and high accuracy of shape. The parabolic reflector is available with different half peak spreads and produces a defined beam emission angle. On coolbeam lamps, a subgroup of the PAR lamps, a dichroic mirror coating is used. Dichroic reflectors focus the visible light but allow a large part of the thermal radiation to pass through unaffected. This allows the thermal load on the illuminated objects to be reduced by approximately half.

Left: reflector lamp with soft glass bulb and ellipsoid reflector with moderate focusing power. Right: reflector lamp with pressed glass bulb and powerful parabolic reflector