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Index

Appendix A - Tables

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.