Interior Lighting for Designers

Refraction, 111–118
baffles, 116
lenses, 113, 114–115
louvers, 116
mechanics of, 111–112
prisms, 112, 114
solutions, 117
total internal reflection, 115, 118
Relative brightness for equal attraction table,
259
Relative lamp watts for equal quantity of light table,
259
Rendering, color, 45–46
Resistance, electricity, 135–136
Resistance dimmers, 141–142
Resistor, electricity, 135
Retina, eye, 5, 7
Rheostat, 141–142
Rods, eye, 5, 8, 9
Romex, electrical wiring, 136
Room cavity ratio, illuminance calculations, 131

S
Scallop patterns, vertical surface illumination, 214–
216
Scintillation, sparkle, 17
Scotopic vision, 5
Seasonal change, shading, 61
Secondary light source, surface finishes and
reflectance, 31
Semi-diffuse (spread) transmission, light control, 111
Semi-directional incandescent lamps, 69, 71
Semi-recessed housings, luminaires, 149, 151
Semi-specular reflector, described, 108
Semi-specular (spread) reflection, described, 105
Series circuit, described, 136
Service panel, electric distribution, 138
Shading devices, 56–60, 61
movable controls, 57–58
stationary controls, 58–60, 61
Shadows, design, balance of brightness, 236–237
Shallow-contour downlights, point source downlights,
158, 162
Shieldings, rectilinear fluorescent downlights, 167–
168
Sight, perception, 10
Silicon-controlled switch (SCS), solid-state dimmers,
142
Silver-bowl incandescent lamps, 69, 71
Sines and cosines of angles:
refraction, 112
table, 261
Single-pole, double-throw switch, 139–140
Single-pole, single-throw switch, 139

Skylights.See alsoDaylight

defined, 51

design, 53–54, 55–56

shading devices, 59, 60

Small-cell parabolic louvers, rectilinear fluorescent

downlights, 168

Sodium, high-intensity discharge (HID) light, 49, 93,

94

Soffits, task lights, 197–201

Solid-state dimmers, 142

Spacing criterion, downlights, 168

Spaciousness, subjective impressions, 18, 20

Sparkle:

brightness, 41–42

light elements, 14, 16–17, 18

Spectral distribution, color, 43–45

Specular reflection, described, 105

Specular reflector, described, 108

Specular surfaces, reflected glare, 39

Specular vertical surface illumination, design, 218

Speed of light, 3

Spread reflection.SeeSemi-specular (spread)

reflection

Square law dimming curve, dimming control, 143

Stationary controls, shading devices, 58–60, 61

Stimulation, degrees of, psychology, 11–12

Stroboscopic effect, fluorescent lamps, 92

Subjective impressions:

brightness, 122, 123

color, 46

psychology, 18–23

three-dimensional form, 35

Sunlight, defined, 51.See alsoDaylight

Surface-mounted housings, luminaires, 149, 152–

154

Surface reflectance:

brightness, 31

photometrics, 133–134

Suspended ceiling system, rectilinear fluorescent

downlights, 167

Switch control, 139–141

manual, 139–140

occupancy sensors, 140

photosensors, 140–141

timers, 140

wireless remote, 141

T

Task lights:

design, 218–220

light elements, 14, 16, 17, 18

luminaires, 197–201

T8 fluorescent lamps, rare-earth phosphores, 86–87.

See alsoFluorescent lamps

INDEX