PAR lamps (Parabolic Aluminized Reflector), also known as Sealed Beams, are conventional incandescent or tungsten halogen lamps with a parabolic reflector mounted behind the filament	The front of the lamp is sealed with a lens which, in conjunction with the reflector, concentrates the light at a specific, fixed angle.	PARs produce fixed beam angles which are not adjustable. The light beam of PAR lamps is oval in shape.
A variety of PAR lamps.	A typical PAR lamp.	The beam shape of a PAR

There are many PAR lamps available in different sizes, wattage and voltage. PAR lamps are also available in a variety of beam angles. For instance, the 1 kW PAR 64 comes in four versions: VNSP (very narrow spot);field angle 24°X10° NSP   (narrow spot);field angle 26°X14° MFL   (medium flood);field angle 44°X21° WFL   (wide flood);field angle 71°X45°	PAR lamps are used in luminaires called parcans, which are simple fixtures, usually made of aluminum, with no optical system. The use of parcans is widespread and they are considered to be robust, efficient and relatively inexpensive.