Table 1 - Typical Ceiling Reflectances %
87
|
yellow
|
greyness group B
|
86
|
yellow-red
|
greyness group B
|
81
|
green-yellow
|
greyness group B
|
80
|
white emulsion on plain plaster
|
|
71
|
yellow
|
greyness group C
|
70
|
white emulsion on acoustic tiles
|
|
68
|
neutral
|
greyness group A
|
64
|
yellow
|
greyness group E
|
61
|
green-yellow
|
greyness group B
|
60
|
white emulsion on no-fines concrete
|
|
50
|
white emulsion on wood-wool slab
|
|
46
|
yellow-red
|
greyness group C
|
45
|
green
|
greyness group C
|
Table 2 - Typical Wall Reflectances %
80
|
white emulsion on plain plaster
|
80
|
white glazed tiles
|
70
|
white gault brick
|
65
|
pink plaster
|
40
|
white asbestos cement
|
40
|
light-grey brick
|
40
|
smooth Portland cement
|
35
|
stainless steel
|
30
|
fletton brick
|
25
|
light-grey concrete
|
25
|
rough Portland cement
|
25
|
London stock brick
|
25
|
light-oak & mahogany timber panelling
|
20
|
medium-oak & teak timber panelling
|
20
|
dark-grey concrete
|
15
|
blue engineering bricks
|
05
|
black-painted chalkboard
|
Table 3 - Typical Floor Reflectances %
80
|
white paper
|
|
79
|
red
|
greyness group A
|
62
|
blue
|
greyness group B
|
62
|
red-purple
|
greyness group B
|
45
|
cement screed
|
|
45
|
cream PVC tiles
|
|
45
|
light-grey carpet
|
|
42
|
blue
|
greyness group C
|
35
|
birch, beech & maple timber
|
|
25
|
brown & cream marbled PVC tiles
|
|
25
|
sage-green carpet
|
|
20
|
medium-oak timber
|
|
20
|
polished cork tiles
|
|
15
|
blue
|
greyness group E
|
10
|
red or heather-brown quarry tiles
|
|
10
|
dark, low-maintenance carpet
|
|
10
|
dark-brown PVC tiles
|
|
10
|
dark-oak timber
|
|
Table 4 - Selection of Typical LMFs
LMF
|
Luminaire Type
|
Environment
|
Cleaning Years
|
0.68
|
D
|
Dirty
|
2.5
|
0.74
|
C
|
Normal
|
1.5
|
0.79
|
B
|
Clean
|
3.0
|
0.80
|
B
|
Normal
|
2.0
|
0.80
|
C
|
Clean
|
2.0
|
0.81
|
C
|
Normal
|
1.0
|
0.81
|
F
|
Normal
|
1.0
|
0.81
|
E
|
Dirty
|
2.0
|
0.82
|
D
|
Normal
|
1.0
|
0.83
|
A
|
Dirty
|
1.0
|
0.83
|
B
|
Dirty
|
1.0
|
0.83
|
D
|
Clean
|
2.0
|
0.84
|
A
|
Normal
|
2.0
|
0.84
|
E
|
Normal
|
3.0
|
0.85
|
A
|
Clean
|
3.0
|
0.86
|
F
|
Clean
|
1.0
|
0.90
|
E
|
Clean
|
3.0
|
0.95
|
A
|
Clean
|
0.5
|
Notes:
1. The above LMF values are examples only; use manufacturers' data if available.
2. Luminaire Types are shown below:
Maintenance Category
|
Typical Luminaire Type
|
A
|
Bare-Lamp Batten
|
B
|
Open-Top Reflector (Ventilated Self Cleaning)
|
C
|
Closed-Top Reflector (Unventilated)
|
D
|
Enclosed (IP2X)
|
E
|
Dustproof (IP5X)
|
F
|
Indirect Uplighter
|
Table 5 - Selection of Typical RSMFs
RSMF
|
Room Size
|
Environment
|
Cleaning Years
|
Flux Distribution
|
0.59
|
Small
|
Dirty
|
3.0
|
Indirect
|
0.66
|
Small
|
Dirty
|
2.0
|
Indirect
|
0.70
|
Med/Lge
|
Dirty
|
2.0
|
Indirect
|
0.75
|
Small
|
Normal
|
1.5
|
Indirect
|
0.78
|
Small
|
Normal
|
1.0
|
Indirect
|
0.78
|
Med/Lge
|
Dirty
|
3.0
|
Direct/Indirect
|
0.80
|
Small
|
Normal
|
2.5
|
Direct/Indirect
|
0.82
|
Med/Lge
|
Normal
|
1.0
|
Indirect
|
0.82
|
Small
|
Dirty
|
1.0
|
Direct/Indirect
|
0.85
|
Med/Lge
|
Normal
|
2.0
|
Direct/Indirect
|
0.88
|
Med/Lge
|
Clean
|
1.0
|
Indirect
|
0.93
|
Small
|
Dirty
|
1.0
|
Direct
|
0.93
|
Small
|
Normal
|
2.0
|
Direct
|
0.94
|
Small
|
Clean
|
3.0
|
Direct
|
0.95
|
Small
|
Clean
|
2.0
|
Direct
|
0.95
|
Med/Lge
|
Normal
|
3.0
|
Direct
|
0.96
|
Med/Lge
|
Normal
|
1.0
|
Direct
|
0.97
|
Small
|
Clean
|
0.5
|
Direct
|
Notes:
1. Room Size
Small: K = 0.7 Medium/Large: K = 2.5/5.0 K = Room Index
Table 6 - Selection of Typical LSFs
LSF
|
Lamp Type
|
Operation Time
|
0.50
|
High-Pressure Sodium, Improved Colour
|
12.0
|
0.60
|
High-Pressure Sodium
|
22.0
|
0.65
|
High-Pressure Sodium, Improved Colour
|
10.0
|
0.68
|
Mercury
|
20.0
|
0.70
|
Metal Halide
|
14.0
|
0.75
|
Fluorescent Multi- and Triphosphor
|
12.0
|
0.80
|
Mercury
|
16.0
|
0.85
|
Fluorescent Halophosphate
|
10.0
|
0.92
|
Mercury
|
10.0
|
0.92
|
High-Pressure Sodium
|
10.0
|
0.93
|
Metal Halide
|
4.0
|
0.95
|
Fluorescent Multi- and Triphosphor
|
8.0
|
0.96
|
High-Pressure Sodium
|
6.0
|
0.97
|
Metal Halide
|
1.0
|
0.98
|
Mercury
|
4.0
|
0.99
|
Fluorescent Halophosphate
|
6.0
|
Notes:
1. The above LSF values are examples only; use manufacturers' data.