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26W Fresnel LensQuick Calculator
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| ROOM SURFACE REFLECTANCES: | ||||
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| 80% Ceiling; 50% Wall, 20% Floor | ||||
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| 1800 Lumens Per Lamp | ||||
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| RCR= 1 (Rm. Width = 10xMtg. Ht. above work plane) | ||||
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| RCR= 5 (Rm. Width = 2xMtg. Ht. above work plane) | ||||
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| RCR=10 (Rm. Width = Mtg. Ht. above work plane) | ||||
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| 20 | 40 | 60 | 80 | 100 | 120 | 140 | |
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| AREA PER FIXTURE IN SQUARE FEET |
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4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
CENTER TO CENTER DISTANCE OF FIXTURES IN FEET
This quick calculator chart determines the number and spacing of 2 Lt. 26 watt Quad Tube units with Fresnel Lens and clear cone, for any level of illumination.
Conversion Factors: 26W, Fresnel Lens with White Cone = F.C.x 0.9; 18W, Fresnel/Clear Cone = 0.8; 18W Fresnel/Clear Cone =0.7.
Spacing Ratio = 1.2Certified Test Report Number: 2550
COMPUTED BY: LSI PROGRAM
PREPARED FOR: LIGHTOLIER INC.
APERTURE: 7 1/4”
REFLECTOR: SPECULAR CLEAR ALZAK CONE WITH REGRESSED FRESNEL LENS
LAMPS: TWO 26W QUAD TUBE LENS EACH RATED AT 1800 LUMINES.
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| CANDELPOWER SUMMARY |
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ACROSS |
| Angle | ALONG | 22.5 | 45 | 67.5 | ACROSS LUMENS | |
45 |
| 0 | 864 | 864 | 864 | 864 | 864 |
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ALONG |
| 5 | 852 | 850 | 851 | 868 | 875 | 82 |
| 10 | 836 | 842 | 860 | 887 | 897 |
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| 15 | 806 | 818 | 849 | 881 | 888 | 238 |
| 90 | 20 | 750 | 774 | 812 | 835 | 842 |
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| 25 | 670 | 703 | 743 | 769 | 771 | 336 |
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| 30 | 572 | 602 | 643 | 670 | 677 |
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| 35 | 453 | 495 | 533 | 556 | 556 | 328 |
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| 40 | 350 | 388 | 416 | 433 | 438 |
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300 |
| 45 | 255 | 284 | 312 | 321 | 322 | 241 |
60 | 50 | 207 | 222 | 240 | 249 | 249 |
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| 55 | 70 | 82 | 93 | 103 | 105 | 102 |
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| 60 | 29 | 31 | 38 | 42 | 41 |
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| 65 | 8 | 9 | 12 | 10 | 10 | 15 |
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| 70 | 3 | 3 | 6 | 3 | 3 |
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600 |
| 75 | 2 | 2 | 3 | 2 | 2 | 3 |
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| 80 | 1 | 1 | 4 | 2 | 1 |
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| 85 | 1 | 2 | 5 | 3 | 2 | 4 |
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| 90 | 2 | 9 | 14 | 6 | 2 |
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| ZONAL LUMENS AND PERCENTAGES | |||||
| Zone | Lumens | % Lamp | % Luminaire | ||||
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30 |
| 657 | 18.25 |
| 48.66 | |||
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| 985 | 27.37 |
| 72.97 | |||
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**EFFICIENCY = 37.5%** |
| 1328 | 36.90 |
| 98.37 | |||
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| 1350 | 37.50 |
| 100.00 | |||
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| 364 | 10.14 |
| 27.03 | ||
DATE: NOVEMBER 18, 1992 |
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| 1.63 | |
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| 1350 | 37.50 |
| 100.00 |
TESTED ACCORDING TO IES PROCEDURES. TEST DISTANCE EXCEEDS FIVE TIMES
THE GREATEST LUMINOUS OPENING OF LUMINAIRE.
Coefficients of Utilization
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| % Effective Ceiling Cavity Reflectance |
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| 80 |
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| %Wall Reflectance |
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| 50 | 30 | 10 | 50 | 30 | 10 |
| 30 | 10 |
| 50 | 30 | 10 | 50 | 30 | 10 | 0 |
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RATIO | 1 | .41 | .40 | .39 | .41 | .40 | .39 | .39 | .38 | .38 |
| .38 | .37 | .36 | .36 | .36 | .35 | .35 | |
3 | .35 | .33 | .32 | .35 | .33 | .32 | .34 | .32 | .31 |
| .33 | .32 | .31 | .32 | .31 | .30 | .30 | ||
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| 2 | .38 | .37 | .35 | .38 | .36 | .35 | .38 | .35 | .34 |
| .35 | .34 | .34 | .34 | .34 | .33 | .32 |
CAVITY | 4 | .33 | .31 | .29 | .32 | .31 | .29 | .32 | .30 | .29 |
| .31 | .29 | .28 | .30 | .29 | .28 | .27 | |
5 | .30 | .28 | .26 | .30 | .28 | .26 | .29 | .27 | .26 |
| .29 | .27 | .25 | .28 | .27 | .25 | .25 | ||
ROOM | 6 | .28 | .26 | .24 | .28 | .26 | .24 | .27 | .25 | .24 |
| .27 | .25 | .24 | .26 | .25 | .23 | .23 | |
7 | .26 | .23 | .22 | .26 | .23 | .22 | .25 | .23 | .22 |
| .25 | .23 | .21 | .24 | .23 | .21 | .21 | ||
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| 8 | .24 | .21 | .20 | .24 | .21 | .20 | .23 | .21 | .20 |
| .23 | .21 | .19 | .22 | .21 | .19 | .19 |
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| 9 | .22 | .20 | .18 | .22 | .20 | .18 | .21 | .19 | .18 |
| .21 | .19 | .18 | .21 | .19 | .18 | .17 |
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| 10 | .20 | .18 | .16 | .20 | .18 | .16 | .20 | .18 | .16 |
| .20 | .18 | .16 | .19 | .17 | .16 | .16 |
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20% FLOOR CAVITY REFLECTANCE
Conversion Factors: 26W, Fresnel Lens with White Cone: C.U. x 0.9; 18W, Fresnel/Clear Cone = 1.1; 18W, Fresnel/White Cone = 1.0.
Calculite® CFL Lensed Downlight 8096
7" Aperture (2) Quad Tube Horizontal Lamp
26W Opal Diffuser and Clear LensQuick Calculator
FOOTCANDLES | 60 |
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| ROOM SURFACE REFLECTANCES: |
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| 80% Ceiling; 50% Wall, 20% Floor |
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| 50 |
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| 1800 Lumens Per Lamp |
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| RCR= 1 (Rm. Width = 10xMtg. Ht. above work plane) | ||||||||||
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| RCR= 5 (Rm. Width = 2xMtg. Ht. above work plane) | ||||||||||
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| RCR=10 (Rm. Width = Mtg. Ht. above work plane) | ||||||||||
INITIAL | 30 |
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| 15 | 30 | 45 |
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| AREA PER FIXTURE IN SQUARE FEET |
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| 4 | 5 |
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CENTER TO CENTER DISTANCE OF FIXTURES IN FEET
This quick calculator chart determines the number and spacing of 2
Tube units with Opal Diffuser and Clear Cone for any level of illumination.
Conversion Factors: Opal Diffuser/White Cone = F.C. x 0.9. Clear Lens/Clear Cone = F.C. x 1.2.
Clear Lens/White Cone = F.C. x 1.1; 18W, Opal Diffuser/Clear Lens = 0.8; Opal Diffuser/White
Cone = 0.7; Clear Lens/Clear Cone = 0.9; Clear Lens/White Cone = 0.8.
Spacing Ratio = 1.2
Certified Test Report Number: 2551
COMPUTED BY: LSI PROGRAM
PREPARED FOR: LIGHTOLIER INC.
APERTURE: 7 1/4”
REFLECTOR: SPECULAR CLEAR WITH REGRESSED OPAL DIFFUSER
LAMPS: TWO 26W QUAD TUBE EACH RATED AT 1800 LUMINES.
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| CANDELPOWER SUMMARY |
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ACROSS |
| Angle | Along | 22.5 | 45 | 67.5 | Across | Lumens |
45 |
| 0 | 634 | 634 | 634 | 634 | 634 |
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ALONG |
| 5 | 622 | 622 | 634 | 643 | 622 | 60 |
| 10 | 613 | 613 | 625 | 635 | 615 |
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| 15 | 594 | 595 | 608 | 620 | 601 | 171 |
| 90 | 20 | 565 | 567 | 582 | 594 | 576 |
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| 25 | 529 | 532 | 549 | 562 | 543 | 251 | |
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| 30 | 482 | 486 | 503 | 519 | 504 |
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| 35 | 430 | 433 | 449 | 464 | 454 | 279 |
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| 40 | 370 | 374 | 386 | 401 | 392 |
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200 |
| 45 | 299 | 302 | 313 | 326 | 319 | 241 |
60 | 50 | 227 | 227 | 234 | 244 | 238 |
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| 55 | 87 | 91 | 96 | 104 | 102 | 104 | |
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| 60 | 30 | 32 | 37 | 41 | 40 |
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| 65 | 7 | 8 | 11 | 10 | 9 | 14 |
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| 70 | 2 | 3 | 6 | 3 | 3 |
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400 |
| 75 | 2 | 2 | 3 | 2 | 1 | 2 |
| 80 | 1 | 1 | 4 | 2 | 1 |
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| 85 | 1 | 1 | 4 | 3 | 1 | 4 |
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| 90 | 1 | 9 | 14 | 7 | 2 |
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600 |
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| ZONAL LUMENS AND PERCENTAGES | |||||
| Zone | Lumens | % Lamp | % Luminaire | ||||
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30 |
| 481 | 13.38 | 42.75 | ||||
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| 761 | 21.15 | 67.55 | ||||
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**EFFICIENCY = 31.1%** |
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| 1106 | 30.73 | 98.15 | |||
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| 1126 | 31.30 | 100.00 | |||
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| 365 | 10.16 | 32.45 | |||
DATE: NOVEMBER 19, 1992 |
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| 20 | .58 |
| 1.85 | ||
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| 1126 | 31.30 | 100.00 |
TESTED ACCORDING TO IES PROCEDURES. TEST DISTANCE EXCEEDS FIVE TIMES
THE GREATEST LUMINOUS OPENING OF LUMINAIRE.
Coefficients of Utilization
% Effective Ceiling Cavity Reflectance
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| 80 |
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| 30 |
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| %Wall Reflectance |
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| 50 | 30 | 10 | 50 | 30 | 10 |
| 30 | 10 |
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| 50 | 30 | 10 | 0 |
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RATIO | 1 | .34 | .33 | .33 | .34 | .33 | .32 | .32 | .32 | .31 |
| .31 | .31 | .30 |
| .30 | .30 | .29 | .29 |
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3 | .29 | .27 | .26 | .29 | .27 | .26 | .28 | .27 | .25 |
| .27 | .26 | .25 |
| .26 | .25 | .25 | .24 |
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| 2 | .32 | .30 | .29 | .31 | .30 | .29 | .30 | .29 | .28 |
| .29 | .28 | .28 |
| .28 | .28 | .27 | .26 |
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CAVITY | 4 | .27 | .25 | .23 | .27 | .25 | .23 | .26 | .24 | .23 |
| .25 | .24 | .23 |
| .25 | .23 | .22 | .22 |
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6 | .23 | .21 | .19 | .22 | .20 | .19 | .22 | .20 | .19 |
| .21 | .20 | .19 |
| .21 | .20 | .18 | .18 |
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| 5 | .25 | .23 | .21 | .24 | .22 | .21 | .24 | .22 | .21 |
| .23 | .22 | .21 |
| .23 | .21 | .20 | .20 |
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ROOM | 7 | .21 | .19 | .17 | .20 | .18 | .17 | .20 | .18 | .17 |
| .20 | .18 | .17 |
| .19 | .18 | .17 | .16 |
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8 | .19 | .17 | .15 | .19 | .17 | .15 | .18 | .16 | .15 |
| .18 | .16 | .15 |
| .18 | .16 | .15 | .14 |
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| 9 | .17 | .15 | .14 | .17 | .15 | .14 | .17 | .15 | .14 |
| .17 | .15 | .13 |
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| 10 | .16 | .14 | .12 | .16 | .14 | .12 | .15 | .14 | .12 |
| .15 .13 .12 |
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| 20% FLOOR CAVITY REFLECTANCE |
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Conversion Factors: 26W, Opal Diffuser/White Cone: C.U. x 0.9. Clear Lens/Clear Cone: C.U. x 1.2. Clear | |||||||||||||||||||||
Lens/White Cone: C.U. x 1.1; Opal Diffuser/Clear Lens = 1.1; Opal Diffuser/White Cone = 1.0; Clear |
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Lens/Clear Cone = 1.3; Clear Lens/White Cone = 1.2. |
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| Job Information |
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631 Airport Road, Fall River, MA 02720 • (508)
Lightolier is a Philips group brand