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Compact Fluorescent Lensed Downlight 8098
Page 2 of 2 8 3/4” Aperture (2) 26/32/42W Triple Tube Vandal / Wet Location
Quick Calculator
Spacing Ratio = 1.3
Coefficients Of Utilization
Flush Lens 2-32W Triple Tube
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 .45 .44 .42 .45 .43 .42 .43 .41 .40 .41 .40 .39 .39 .39 .38 .37
2 .40 .38 .35 .39 .37 .35 .38 .36 .34 .37 .35 .33 .35 .34 .33 .32
3 .36 .32 .30 .35 .32 .30 .34 .31 .29 .33 .30 .29 .32 .30 .28 .27
4 .32 .28 .26 .31 .28 .26 .30 .27 .25 .29 .27 .25 .28 .26 .25 .24
5 .29 .25 .22 .28 .25 .22 .27 .24 .22 .26 .24 .22 .26 .23 .21 .21
6 .26 .22 .19 .25 .22 .19 .24 .21 .19 .24 .21 .19 .23 .21 .19 .18
7 .23 .19 .17 .23 .19 .17 .22 .19 .17 .21 .18 .16 .21 .18 .16 .15
8 .21 .17 .15 .20 .17 .15 .20 .17 .15 .19 .17 .14 .19 .16 .14 .14
9 .19 .15 .13 .19 .15 .13 .18 .15 .13 .18 .15 .13 .17 .15 .13 .12
10 .17 .14 .12 .17 .14 .11 .17 .14 .11 .16 .13 .11 .16 .13 .11 .11
ROOM CAVITYRATION
ZONAL LUMENS AND PERCENTAGES
Zone Lumens % Lamp % Luminaire
0-30 577 12.04 27.97
0-40 945 19.70 45.76
0-60 1662 34.63 80.44
0-90 2066 43.04 100.00
40-90 1120 23.35 54.24
60-90 404 8.42 19.56
90-180 0 0.00 0.00
0-180 2066 43.04 100.00
Angle Along 22.5 45 67.5 Across
Lumens
0 736 736 736 736 736
5 734 740 743 739 732 71
10 731 433 727 724 731
15 716 413 716 715 727 202
2
0 687 694 687 691 690
25 661 666 665 668 656 305
3
0 625 629 637 629 622
35 589 594 590 597 590 367
4
0 544 544 539 537 552
45 496 489 489 488 492 378
5
0 443 434 440 437 439
55 381 384 374 371 371 338
60 321 319 312 320 310
65 254 264 249 248 253 250
70 186 198 191 192 186
75 126 129 126 117 125 133
80 68 56 54 59 63
85 9 17 19 12 20 21
9000000
CANDLEPOWER SUMMARY
10
20
30
40
50
60
70
80
25 50 75 100 125 150 175 200
4 5 6 7 8 9 1
0
1
1
1
2
1
3
1
4
1
5
ROOM SURFACE REFLECTANCES:
2400 Lumens Per Lamp
RCR = 1
RCR = 5
RCR = 10
80% Ceiling; 50% Wall; 20% Floor
(Rm. width = 10 x Mtg. Ht. above work plane)
(Rm. width = 2 x Mtg. Ht. above work plane)
(Rm. width = Mtg. Ht. above work plane)
Certified Test Report Number: LSC8203
Computed By: Lighting Sciences Canada ltd.
Prepared For Lightolier CFI
Aperture: 8 3/4" Dia.
Reflector: Specular Clear Alzak
Lamps: 2 x 32W TTT Rated at 2400 Lumens
Efficiency: 43.0%
For 26W and 42W lamps, multiply C.U.'s X 1.0.
185
370
555
740
8
5°
75°
65°
55°
45°
35°
25°
15°
5°
T
his quick calculator chart determines the number and spacing of 2 lt. - 32W TTT units with CLEAR reflector,
f
or any level of illumination. Lighting Conversion Factors = 26W, F.C. X 0.8; 42W, F.C. X 1.3)
Center to Center Distance of Fixtures in Feet
A
rea Per Fixture in Square Feet
Initial Footcandles
Lightolier a Genlyte company www.lightolier.com
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.
© 2006 Genlyte Group LLC • C0406
J
ob Information Type: