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coefficients of utilization — zonal cavity method
RF 20 20 20
RC 80 50 30
RW 70 50 30 50 30 10 50 30 10
1 73 71 69 67 65 63 64 63 61
2 68 63 59 60 57 54 57 55 53
3 62 56 51 53 49 46 51 48 46
4 57 50 45 48 43 40 46 43 40
5 53 45 40 43 38 35 42 38 35
6 49 41 35 39 34 31 38 34 31
7 45 37 31 35 31 27 35 30 27
8 42 34 28 32 28 25 32 27 24
9 40 31 26 30 25 22 29 25 22
10 37 29 24 28 23 20 27 23 20
visual comfort probability (VCP) average 100 fc; reflectances 80/50/20
room size ceiling height ceiling height
W L 8.5 10.0 13.0 16.0 8.5 10.0 13.0 16.0
20 20 67 61 59 70 63 57 54 65
20 30 70 65 60 59 67 61 54 54
20 40 73 68 64 61 70 64 59 56
20 60 75 70 67 64 72 67 62 59
30 20 72 66 59 67 69 62 56 64
30 30 75 69 60 57 72 66 57 53
30 40 77 71 64 59 75 68 61 56
30 60 79 73 67 62 76 71 64 59
30 80 80 75 69 65 78 73 66 62
40 20 75 69 63 66 73 66 60 64
40 30 78 72 64 58 75 69 61 55
40 40 80 74 67 60 77 71 64 57
40 60 81 76 70 63 79 73 67 60
40 80 82 78 72 65 80 75 69 63
40 100 83 79 74 68 81 77 71 65
60 30 79 74 67 61 76 71 64 58
60 40 80 76 70 62 78 73 67 60
60 60 82 78 72 65 80 75 70 63
60 80 83 79 74 67 81 77 72 65
60 100 84 80 76 69 82 78 73 67
100 40 81 76 73 66 79 74 69 64
100 60 83 79 74 68 81 76 72 66
100 80 84 80 76 71 82 78 74 69
100 100 85 82 78 72 84 80 76 70
Deepcel Plus DPA2G9LS26U
Page 2 of 2 2' x 2' Recessed Fluorescent, 3", 9 Cell Parabolic Louver
Static or Air/Return, 2 Lamp 6"U T8
Lightolier a Genlyte company www.lightolier.com
Technical Information: (978) 657-7600 • Fax (978) 658-0595
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.
© 2007 a Genlyte company
Section 2/Folio G51-20 Rev. A
Job Information Type:
Options/Accessories
Plaster Frame: Catalog Number: PF22.
Continuous Row Installation: For F type fixtures, half width flanges are required between
fixtures. Order Catalog Number: 2FC TRIM CSP (each joint).
Radio Interference Filter:
To order one RIF per fixture; SUFFIX: R. To order one RIF per ballast;
SUFFIX: B.
Electrical Wiring Options: Consult factory.
Air Closure Strip:
SUFFIX: ACS2 (factory installed).
Drywall Kit: Order Catalog Number: FK92X2. (Request Folio OA30-10 Rev. A).
Chicago Plenum: SUFFIX: CP.
Specifications
Performance: In an installation of 2 lamp 31W luminaires in a room cavity ratio of 1,
reflectance 80% ceiling, 50% wall, 20% floor, the C.U. shall not be less than .71. To prevent
glare the VCP shall be not less than 63 either lengthwise or crosswise (at 100fc level) and
the average brightness at 65° shall not exceed 2502 candelas per square meter. To control
veiling reflections, luminaire output in the 30°-90° zone shall not be less than 67.2%.
Air Handling (DPA only) side air pasaages for air supply or air return. Supply air is discharged
vertically. Optional side closure strips. Air return is also provided through the lamp compartment
through fixture body ends.
Materials: Chassis parts are die-formed code gauge cold rolled steel. Housing
is ribbed for
rigidity with side rails hemmed over and housing ends turned-in for safe handling.
Louver is
pre-anodized aluminum (Coilzak
®
or equal.
Specifications (continued)
Finish: Chassis exterior–black baked polyester enamel. Cavity–white baked polyester
enamel minimum 86% reflectance. Phosphate undercoating. Louver–low iridescence semi-
specular anodized vertical grain aliminum reflector sheet is standard.
Electrical: Thermally protected class “P” ballast C.B.M. approved, non PCB. If K.O. is with-
in 3" of ballast, use wire suitable for at least 90°.
Labels: I.B.E.W. UL and ULc Listed.
Photometry Model No. DPA2G9LS26U120SO
LER = FP - 53.4 IW - 57.2 BF - 0.87
Comparative yearly lighting energy cost per 1000 lumens = $4.49
THISREPORTISBASEDONPUBLISHEDINDUSTRYPROCEDURES•FIELDPERFORMANCEMAYVARYFROMLABORATORYPERFORMANCE.
Deepcel Plus
Parabolic:
Pre-anodized
aluminum
louver
Body Style:
A=Air Supply
S=Static
2
Fixture
Width
2
Lamp
Quantity
6U
Lamp Type/
Fixture Length:
6"U T8
2 Lamp Only
(Nominal 24")
NOTE:
For Linear T5 lamp
option, consult
factory.
Options:
Add appropriate
suffix to catalog no.,
ie: (CP)
Ballast Type:
<20THD <10THD
1-2 Lamp Elec. T8 SO * H
I *
LOL T8 Dimming PS –
*Instant Start Standard
Other dimming options, consult factory.
NOTE:
For T8 UNV, you must use HI Ballast Code.
Ordering Information
Explanation of Catalog Number. Example: DPA2G9LS26U120SOCP
Ceiling Type:
G= Grid
(lay-in T bar)
F= Flanged (over
lap) Z spline and
plaster frame
T= Slot grid or
two-directional
concealed T
(see options)
9
Number of
Cells:
9=3 rows of 3
Louver Finish:
L = Low
iridescence
Semi-specular
(standard)
P =Low
iridescence
Specular
W =White Baked
Enamel
S
Single "V"
Reflector
room cavity ratio
luminaries lengthwise
luminaries crosswise
G00027
DPA2G9LS26U120SO
2 T8 U6. EACH RATED 2750 LUMENS.
2X2 TROFFER WITH 3X3 9 CELL SEMI-SPECULAR LOUVER
Voltage:
120, 277 or
UNV=120-277
DP
Standard Deepcel
DY
For NYC Code – I.B.E.W. Manufactured
ND
For NYC Code – Local 3 Manufactured
5½" Deep Body