Cut Sheet

MOUNTING DATA
Continuous row mounting of flanged units requires CRE and CRM trim options
(see Options).
GT8 2'x4' Static T8 Troffer
DIMENSIONS
NOTE:
1 Recommended rough-in dimensions for F-trim fixtures 24"x48" (Tolerance is +1/4"-0").
Swing-gate range 1-3/16" to 3-15/16". Swing-gate span 23-3/8" to 26-11/16". Fixture
swing-gate points require additional 1-1/16" over nominal fixture height.
PHOTOMETRICS
Calculated using the zonal cavity method in accordance with IESNA LM41 procedure. Floor reflectances are 20%.
Lamp configurations shown are typical. Full photometric data on these and other configurations available upon request.
2GT8 4 32 A12 1/4
Report LTL 7425
Lumens per lamp - 2850 – Lum. eff. - 78.6%
S/MH (along) 1.2 (across) 1.4
Coefficient of Utilization
Ceiling 80% 70% 50%
Wall 70% 50% 30% 70% 50% 30% 50% 30%10%
0 949494 919191 878787
1 868279 848178 777573
2 797368 777167 686461
3 726458 706357 615652
4 665751 655650 544945
5 615145 605144 494339
6 574740 554639 443934
7 534236 514235 403531
8 493932 483832 373127
9 463529 453529 342925
10 43 33 27 42 32 27 32 26 22
Zonal Lumens Summary
Zone Lumens%Lamp%Fixture
0-30 2718 23.8 30.3
0-40 4481 39.3 50.0
0-60 7553 66.3 84.2
0-90 8965 78.6 100.0
90-180 0 0 0
0-180 8965 78.6 100.0
2GT8 2 32 A12
Report LTL 7424
Lumens per lamp - 2850 – Lum. eff. - 81.7%
S/MH (along) 1.2 (across) 1.4
Coefficient of Utilization
Ceiling 80% 70% 50%
Wall 70% 50% 30% 70% 50% 30% 50% 30%10%
0 979797 959595 919191
1 898682 878481 807876
2 827570 807469 716763
3 756760 736559 635854
4 695952 675852 565146
5 635346 625246 514540
6 594841 474740 464035
7 544437 534336 423631
8 514033 493933 383228
9 473730 463630 352925
10 44 34 27 43 33 27 32 27 23
Zonal Lumens Summary
Zone Lumens%Lamp%Fixture
0-30 1372 24.1 29.4
0-40 2277 39.9 48.9
0-60 3907 68.5 83.9
0-90 4658 81.7 100.0
90-180 0 0 0
0-180 4658 81.7 100.0
2GT8 3 32 A12 1/3
Report LTL 7421
Lumens per lamp - 2850 – Lum. eff. - 80.1%
S/MH (along) 1.2 (across) 1.4
Coefficient of Utilization
Ceiling 80% 70% 50%
Wall 70% 50% 30% 70% 50% 30% 50% 30%10%
0 959595 939393 898989
1 888481 858279 797674
2 807469 787268 706662
3 746659 726458 625753
4 685852 665751 555046
5 625245 615245 504440
6 584740 564740 453935
7 544336 524236 413531
8 503933 493932 383228
9 473630 453629 352925
10 44 33 27 43 33 27 32 27 23
Zonal Lumens Summary
Zone Lumens%Lamp%Fixture
0-30 2066 24.2 30.2
0-40 3412 39.9 49.8
0-60 5768 67.5 84.2
0-90 6851 80.1 100.0
90-180 0 0 0
0-180 6851 80.1 100.0
Energy (Calculated in accordance with NEMA standard LE-5)
ANNUAL LAMP LAMP BALLAST
LER.FL ENERGY COST* DESCRIPTION LUMENS FACTOR WATTS
73 $3.29 (2) 32WT8 2850 .90 58
70 $3.43 (3) 32WT8 2850 .87 85
73 $3.29 (4) 32WT8 2850 .88 109
* Comparative yearly lighting energy cost per 1000 lumens
Sheet #: GT8-2x4
Lithonia Lighting
Fluorescent
One Lithonia Way, Conyers, GA 30012
Phone: [phone] Fax: [phone]
www.lithonia.com
©1999 Acuity Brands Lighting, Inc., 8/23/07