Interior Lighting for Designers

are used in recessed luminaires, the upward

light emitted by the lamp is redirected in a

downward direction by a secondary reflector.

White-bowllamps, also used for indirect

lighting, have a translucent white coating on

the inner surface of the bulb bowl, which

reduces the direct filament glare. As with

silver-bowl lamps, white-bowl lamps require

additional control elements.

Directional Sources

Directionalsources are lamps that are com-

plete optical systems; they include a source

(the filament), a reflector, and sometimes a

lens or a filament shield. Lamps in this cate-

gory are reflector (R),aluminumreflector

(AR), multifacetedmirror-reflector (MR), and

parabolicaluminizedreflector (PAR). These

directional sources are available in a wide

range of wattages and beam-spreads, as

indicated in table 2 in the Appendix.

INCANDESCENT LAMPS

Figure 6.6Clear, inside-frosted (acid-etched), and soft-white (silica-coated) lamps.

Figure 6.7Silver-bowl lamp.