Calculite® CFL Open Downlight  8023

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Quick Calculator

ROOM SURFACE REFLECTANCES:

 

 

FOOTCANDLES

60

80% Ceiling; 50% Wall; 20% Floor

50

2400 Lumens Per Lamp

RCR= 1 (Rm. Width= 10xMtg. Ht. above work plane)

 

 

40

RCR= 5 (Rm. Width= 2xMtg. Ht. above work plane)

 

RCR=10 (Rm. Width= Mtg. Ht. above work plane)

INITIAL

30

 

20

 

 

 

 

10

 

 

10

 

20

30

40

50

60

70

 

 

 

AREA PER FIXTURE IN SQUARE FEET

 

 

2

3

4

5

6

 

7

 

8

CENTER TO CENTER DISTANCE OF FIXTURES IN FEET

This quick calculator chart determines the number and spacing of 1 It.- 32W PL-T units with white cross blade, for any level of illumination.

Conversion Factors: 32W PLT with Aluminum Cross Blade, f.c. x 0.7; 26W PLT with white cross blade, f.c. x 0.8; 26W with Aluminum Cross Blade, f.c. x 0.6.

Spacing Ratio = 1.1

CERTIFIED TEST REPORT NO. 0194FR COMPUTED BY LSI PROGRAM **TEST-LITE**

CALCULITE 5 3/4" DIA. APERTURE RECESSED FLUORESCENT CROSS BLADE DOWNLIGHT WITH WHITE CROSS BLADE 1-32W PL-T COMPACT FLUORESCENT LAMP.

LUMEN RATING = 2400 LMS. TESTED ACCORDING TO IES PROCEDURES. TEST DISTANCE EXCEEDS FIVE TIMES THE GREATEST LUMINOUS OPENING OF LUMINAIRE.

8 3/4" Aperture Triple Tube Vertical Lamp

180

150

120

 

ACROSS

 

 

45

 

 

ALONG

 

 

 

90

200

 

60

 

 

400

 

 

600

 

 

0

 

30

** EFFICIENCY = 33.5% **

 

Coefficients Of Utilization

 

 

CANDLEPOWER

 

 

ANGLE

ALONG 22.5

45

67.5 ACROSS LUMENS

0

593

593

593

593

593

 

5

575

575

580

584

585

55

10

536

538

541

549

558

 

15

487

485

491

522

542

142

20

436

427

439

478

506

 

25

377

366

388

425

460

184

30

309

301

325

366

402

 

35

228

233

254

279

308

163

40

166

178

185

192

214

 

45

128

133

126

129

146

105

50

93

93

92

97

104

 

55

73

73

74

79

84

69

60

58

58

59

64

68

 

65

45

45

47

51

53

48

70

34

35

36

39

40

 

75

24

24

26

28

29

28

80

15

16

17

18

20

 

85

7

7

8

10

11

10

90

3

2

3

4

4

 

ZONAL LUMENS AND PERCENTAGES

ZONE

LUMENS

% LAMP

%LUMINAIRE

0-30

 

380

15.86

 

47.31

0-40

 

544

22.67

 

67.61

0-60

 

718

29.93

 

89.28

0-90

 

804

33.53

100.00

40-90

 

260

10.86

 

32.39

60-90

 

86

 

3.59

 

10.72

90-180

 

0

 

.00

 

.00

0-180

 

804

33.53

100.00

 

 

 

 

% EFFECTIVE CEILING CAVITY REFLECTANCE

 

 

 

 

 

 

 

80

 

 

70

 

 

 

50

 

 

 

30

 

 

10

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

% WALL REFLECTANCE

 

 

 

 

 

 

 

 

 

50

30

10

50

30

10

 

50

30

10

 

50

30

10

50

30

10

0

 

 

 

 

 

1

.36

.35

.34

.36

.35

.34

 

.34

.34

.33

 

.33

.32

.32

.32

.31

.31

.30

RATIO

2

.33

.32

.30

.33

.31

.30

 

.31

.30

.29

 

.31

.30

.29

.30

.29

.28

.27

3

.30

.28

.27

.30

.28

.27

 

.29

.28

.26

 

.28

.27

.26

.27

.26

.25

.25

 

 

 

CAVITY

4

.28

.26

.24

.28

.26

.24

 

.27

.25

.24

 

.26

.25

.24

.26

.24

.23

.23

6

.24

.22

.20

.24

.22

.20

 

.23

.21

.20

 

.23

.21

.20

.22

.21

.20

.19

 

5

.26

.24

.22

.26

.23

.22

 

.25

.23

.22

 

.24

.23

.21

.24

.22

.21

.21

ROOM

7

.22

.20

.18

.22

.20

.18

 

.21

.19

.18

 

.21

.19

.18

.21

.19

.18

.17

8

.21

.18

.17

.20

.18

.17

 

.20

.18

.17

 

.20

.18

.17

.19

.18

.16

.16

 

9

.19

.17

.15

.19

.17

.15

 

.19

.17

.15

 

.18

.16

.15

.18

.16

.15

.15

 

10

.18

.16

.14

..18

.16

.14

 

.17

.15

.14

 

.17

.15

.14

.17

.15

.14

.13

20% FLOOR CAVITY REFLECTANCE

Conversion Factors: 32W PLT with Aluminum Cross Blade, C.U. x 0.7;

26W PLT with White Cross Blade, C.U. x 1.1; Aluminum Cross Blade, C.U. x 0.8.

Job Information

Type:

631 Airport Road, Fall River, MA 02720 • (508) 679-8131 • Fax (508) 674-4710 We reserve the right to change details of design, materials and finish. www.lightolier.com © 2008 Philips Group • A0608

Lightolier is a Philips group brand

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Lightolier C4P20GD specifications Calculite CFL Open Downlight 

C4P20GD specifications

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