Interior Lighting for Designers

TABLE 11

LAMP LUMEN DEPRECIATION FACTORS

Lamp Description Shape Nominal Wattage

Lamp Lumen Depreciation

(LLD) Factors

Incandescent

Extended service A, PS 15–70 0.85

General service A, PS, S To 40 0.85

50–1,500 0.89

Projector PAR 38-64 75–1,000 0.84

Reflector R40 150–500 0.86

R52-57 500–1,000 0.81

Rough service A, PS 50–200 0.79

Showcase T10 25–40 0.78

Silver-bowl A, PS 200–500 0.75

Three-way A, T 30–150 0.85

PS 100–300 0.72

Tungsten-halogen T 200–1,500 0.96

Vibration A19 50 0.72

Fluorescent

Cool white T12 40 0.87

Cool white deluxe T12 40 0.82

Warm white T12 40 0.87

Warm white deluxe T12 40 0.82

Natural T12 40 0.89

Lite white T12 40 0.87

Daylight T12 40 0.87

Cool green T12 40 0.82

RE-700 series T8 40 0.90

RE-800 series T8 25–40 0.93

T12 30–40 0.90

Chroma 50 T12 40 0.87

Chroma 75 T12 40 0.86

INTERIOR LIGHTING FOR DESIGNERS