Indirect/direct – sd, se, sf, Lighting systems, Coefficients of utilization – Lightolier T5 User Manual

Page 6: How to specify

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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˚

90˚

85˚

95˚

105˚

75˚

65˚

55˚

115˚

125˚

180˚ 175˚ 165˚ 155˚ 145˚ 135˚

0˚ 5˚ 15˚ 25˚ 35˚ 45˚

90˚

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˚

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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