Interior Lighting for Designers

Open-reflector downlight, point source downlights,
154, 157
Open-reflector wall-washers, asymmetric wash lights,
171, 176–177
Overhangs, shading devices, 58, 59

P
Paintings, artwork lighting design, 224–227
Paper-based tasks, task lights, 220
Parabolic aluminized reflector (PAR) incandescent
lamps, 71, 72
Parabolic contour reflector, described, 107
Parabolic louvers, rectilinear fluorescent downlights,
168
Parallel circuit, described, 136–137
Pendant-mounted housings, luminaires, 154, 155
Perception, 3–10.See alsoPsychology
brain, 6
brightness, 6, 8
color, 9–10, 43–44
eye, 4–6
sight, 10
three-dimensional form, 35, 224
visible light, 3–6
Perceptual clarity, subjective impressions, 20–22
Photometers, 8
Photometrics, 121–134
illuminance calculations, 126–133
limitations of, 121–123
luminous intensity distribution curve, 123–124
recommended illuminance values, 124–126
surface reflectance, 133–134
terms in, 121
Photopic vision, 5
Photosensors:
daylight energy control, 62
energy management controls, 147–148
switch control, 140–141
Pinhole, image formation, 4–5
Pleasantness, subjective impressions, 22
Point source downlights, 154–166
Polar graph, luminous intensity distribution curve,
122, 123–124
Power factor, ballast systems, 101–102
Power line carrier systems, 147
Pre-heat ballast circuits, fluorescent lamps, 83–84
Presbyopia, 5
Prismatic lenses, rectilinear fluorescent downlights,
168
Prisms:
refraction, 114
visible light, 3–4
Private space, perceptual clarity, 22
Psychology, 11–23.See alsoPerception

brightness contrast, 12–14

degrees of stimulation, 11–12

emotional impact, 11

light elements, 14, 16–18

subjective impressions, 18–23, 46, 122, 123

three-dimensional form, 35

variation, 23

Public space, perceptual clarity, 20–22

Pulse-start metal halide lamps, 93–94

Pupil, eye, 5

Purkinje shift, 9

Q

Quartz, tungsten-halogen lamps, 74

R

Radio-controlled wireless remote switch control, 141

Rapid-start ballast circuits, fluorescent lamps, 85–86

Rare-earth fluorescent light:

color, 48–49

types of, 86–87

Recessed housings, luminaires, 149, 150

Recommended illuminance values:

age level, 125–126

photometrics, 124–126

table of, 267–268

Rectilinear fluorescent downlights, 166–168

Rectilinear graph, luminous intensity distribution

curve, 123–124

Reflectance, surface finishes and, brightness, 31

Reflected glare, described, 39–41

Reflected sparkle, described, 41

Reflection, 105–109

contours, 106–108

circular, 107–108

elliptical, 107

parabolic, 107

diffuse, 105–106

reflector types, 108–109

diffuse, 109, 110

materials, 109

semi-specular, 108

specular, 108

semi-specular (spread), 105

specular, 105

total internal reflection, light control, 115, 118

upward light, 26

Reflector(s):

glare control, 119–120

point source downlights, 164–166

Reflector (R) fluorescent lamps, 87–88

Reflector (R) incandescent lamps, 71, 72, 73

Reflector wall-washers, asymmetric wash lights, 171–

178

INTERIOR LIGHTING FOR DESIGNERS