Indirect/direct – sd, se, sf, Lighting systems, Coefficients of utilization – Lightolier T5 User Manual
Page 6: How to specify
1. Housing: Extruded
aluminum. Die-cast
end plate mechanically
attached with no
exposed fasteners.
2. Lamping: Two T5 (28 or
54 watt as specified)
fluorescent lamps.
Provided by others.
3. Reflector: Die-formed
specular aluminum
reflector.
4. Shielding: Die-formed
pierced CRS.
5. Diffuser: Translucent
acrylic diffuser.
Finish: Powder-coated
baked white or aluminum
enamel. Custom colors
available, consult factory.
Labels: UL, ULc and IBEW.
Electrical: Specify 120 volt
or 277 volt. Color-coded
quick connectors allow
ease of connection for
joiner modules. For special
circuiting, consult factory.
Ballast is class “P”,
thermally protected,
electronic, class “A” sound
rating, less than 10% THD,
end of lamp life cutoff.
Options & Accessories:
L, T, X, Inline joiner blocks
and emergency battery
pack available.
Luminaire Lengths:
Individual–46 3/4" and
94 3/4". Joiner–48" and 96".
SD
2-Lamp T5 Pierced Indirect/Direct
SE
2-Lamp T5 Louvered Indirect/Direct
SF
2-Lamp T5 Acrylic Indirect/Direct
Indirect/Direct –
SD, SE, SF
1. Housing: Extruded
aluminum. Die-cast
end plate mechanically
attached with no
exposed fasteners.
2. Lamping: Two T5 (28
or 54 watt as specified)
fluorescent lamps.
Provided by others.
3. Reflector: Die-formed
specular aluminum
reflector.
4. Shielding: Die-formed
CRS.
5. Louver: Straight blade
louver finished to match
housing.
Finish: Powder-coated
baked white or aluminum
enamel. Custom colors
available, consult factory.
Labels: UL, ULc and IBEW.
Electrical: Specify 120 volt
or 277 volt. Color-coded
quick connectors allow
ease of connection for
joiner modules. For special
circuiting, consult factory.
Ballast is class “P”,
thermally protected,
electronic, class “A” sound
rating, less than 10% THD,
end of lamp life cutoff.
Options & Accessories:
L, T, X, Inline joiner blocks
and emergency battery
pack available.
Luminaire Lengths:
Individual–46 3/4" and
94 3/4". Joiner–48" and 96".
1. Housing: Extruded
aluminum. Die-cast
end plate mechanically
attached with no
exposed fasteners.
2. Lamping: Two T5 (28
or 54 watt as specified)
fluorescent lamps.
Provided by others.
3. Shielding: Sandblasted
1/4" thick acrylic.
Finish: Powder-coated
baked white or aluminum
enamel. Custom colors
available, consult factory.
Labels: UL, ULc and IBEW.
Electrical: Specify 120 volt
or 277 volt. Color-coded
quick connectors allow
ease of connection for
joiner modules. For special
circuiting, consult factory.
Ballast is class “P”,
thermally protected,
electronic, class “A” sound
rating, less than 10% THD,
thermally protected, end
of lamp life cutoff.
Options & Accessories:
L, T, X, Inline joiner blocks
and emergency battery
pack available.
Luminaire Lengths:
Individual–46 3/4" and
94 3/4". Joiner–48" and 96".
Lighting Systems
Coefficients of
Utilization
% Wall Reflectance
70
50
30
0
82
82
82
1
75
71
68
2
68
62
57
3
62
54
49
4
57
48
42
5
52
43
36
6
47
38
32
7
44
34
28
8
40
31
25
9
37
28
22
10
35
25
19
80% Effective Ceiling
Cavity Reflectance
20% Floor Cavity
Reflectance
Room Cavity Ratio
82.2% efficiency
2 lamp F28T5
Report No. LRL299-IF
20% Direct
80% Indirect
Coefficients of
Utilization
% Wall Reflectance
70
50
30
0
96
96
96
1
87
82
78
2
79
72
66
3
72
63
56
4
66
55
48
5
60
49
42
6
55
44
37
7
51
40
32
8
47
36
28
9
44
32
25
10
40
29
22
80% Effective Ceiling
Cavity Reflectance
20% Floor Cavity
Reflectance
Room Cavity Ratio
89.5% efficiency
2 lamp F28T5
Report No. LRL299-IH
53% Direct
47% Indirect
Coefficients of
Utilization
% Wall Reflectance
70
50
30
0
81
81
81
1
74
71
68
2
68
63
58
3
63
56
50
4
57
50
44
5
53
45
39
6
49
40
34
7
45
36
30
8
42
33
27
9
39
30
24
10
36
27
22
80% Effective Ceiling
Cavity Reflectance
20% Floor Cavity
Reflectance
Room Cavity Ratio
79.3% efficiency
2 lamp F28T5
Report no. LRL299-IE
29% Direct
71% Indirect
1
3
4
2
5
6 1/16"
2 1/4"
1
3
4
2
5
6 11/16"
4 1/4"
1
3
2
7"
4 7/1 6"
2,000
700
500
400
200
FOOTCANDLE
20
30
50
70 100
1
2
3
4 5
7
10
20
30 40 50
70
100
200
ROOM AREA IN SQUARE FEET
NUMBER OF FIXTURES REQUIRED
300
1,000
100
1. Find room area on
vertical axis.
2. Move across chart to
footcandle curve.
3. Move down to hori-
zontal axis and read
number of luminaires
required.
Suspension
18", rows 10',
brightness
ratio 6.8:1
2,000
700
500
400
200
FOOTCANDLE
20
30
50
70 100
1
2
3
4 5
7
10
20
30 40 50
70
100
200
ROOM AREA IN SQUARE FEET
NUMBER OF FIXTURES REQUIRED
300
1,000
100
1. Find room area on
vertical axis.
2. Move across chart to
footcandle curve.
3. Move down to hori-
zontal axis and read
number of luminaires
required.
2,000
700
500
400
200
FOOTCANDLE
20
30
50
70 100
1
2
3
4 5
7
10
20
30 40 50
70
100
200
ROOM AREA IN SQUARE FEET
NUMBER OF FIXTURES REQUIRED
300
1,000
100
1. Find room area on
vertical axis.
2. Move across chart to
footcandle curve.
3. Move down to hori-
zontal axis and read
number of luminaires
required.
Suspension
18", rows 10',
brightness
ratio 3.3:1
90˚
85˚
95˚
105˚
75˚
65˚
55˚
115˚
125˚
180˚ 175˚ 165˚ 155˚ 145˚ 135˚
0˚ 5˚ 15˚ 25˚ 35˚ 45˚
500
250
750
500
1000
250
1250
1250
1000
750
0
90˚
0˚
90˚
85˚
95˚
105˚
75˚
65˚
55˚
115˚
125˚
180˚ 175˚ 165˚ 155˚ 145˚ 135˚
0˚ 5˚ 15˚ 25˚ 35˚ 45˚
90˚
0˚
750
600
450
300
150
0
150
300
450
600
750
90˚
85˚
95˚
105˚
75˚
65˚
55˚
115˚
125˚
180˚ 175˚ 165˚ 155˚ 145˚ 135˚
0˚ 5˚ 15˚ 25˚ 35˚ 45˚
750
600
450
300
150
0
150
300
450
600
750
90˚
0˚
How to Specify
Finish
Series SD
White
Aluminum
28 watt
SD-28-WH
SD-28-AL
54 watt
SD-54-WH
SD-54-AL
Please refer to the flap at the back of the
brochure for complete ordering instructions.
How to Specify
Finish
Series SE
White
Aluminum
28 watt
SE-28-WH
SE-28-AL
54 watt
SE-54-WH
SE-54-AL
Please refer to the flap at the back of the
brochure for complete ordering instructions.
How to Specify
Finish
Series SF
White
Aluminum
28 watt
SF-28-WH
SF-28-AL
54 watt
SF-54-WH
SF-54-AL
Please refer to the flap at the back of the
brochure for complete ordering instructions.
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