Figure 4.9. Reflector lamp.

PARABOLIC ALUMINIZED REFLECTOR (PAR) lamps produce a controlled beam of light. See Figure 4.10. There is a range of beam widths from narrow spot to wide flood. The beam spread is controlled by the lens pattern of the front glass.

The two-piece, pressed hard glass construction provides better beam control than the standard reflector lamp. PAR lamps are also suitable for exterior use in a suitably protected lampholder.

Figure 4.10. PAR lamps.

CROWN MIRRORED lamps are a form of reflector lamp for use with a special type of reflector luminaire. The reflector coating on the top halfsphere of the lamp prevents any direct forward light from the filament and reflects it backwards onto the luminaire reflector. The two reflectors control all the light so there is virtually no spill light outside the beam. Spotlights using this principle cause the minimum distracting glare to persons viewing or passing the display area.

These lamps use the same bulb shape as gls lamps except for the 40W version which uses a smaller bulb of "lemon shape" hence the reference LS45.

Figure 4.11. Crown mirrored lamp in luminaire.