San Diego Plastics
2220 McKinley Avenue
National City  CA  91950
800/925-4855   619/477-4855   FAX 619/477-4874

  

Para-Lite 4
3/4" x 3/4" 1/2"

Specifications
Parabolic Louvers shall be Para-Lite 4 as manufactured by A.L.P. Lighting Components, Inc., and shall be one piece injection molded of polystyrene or acrylic with all parabolic surfaces prepared with a primary undercoat and a highly specular vacuum metalized finish. Cell dimensions shall be 3/4" x 3/4" x 1/2" and shall provide 33 shielding with a louver efficiency of not less than 53%. This louver has a VCP index rating of .92 (specular silver finish). Available in nominal panel sizes of 1' x 4', 2' x 2' and 2' x 4'.


VISUAL COMFORT PROBABILITY TABLE
100 FC Work Plane Illumination Work Plane FC = 100

  LUMINARIES LENGTHWISE LUMINARIES CROSSWISE
ROOM DIM MOUNTING HEIGHT
W L 8.5 10 13 16 8.5 10 13 16
20 20 100 99 95 92 100 99 92 88
20 30 100 100 97 93 100 100 95 90
20 40 100 100 98 95 100 100 97 93
20 60 100 100 99 96 100 100 98 94
30 20 100 100 96 92 100 100 94 90
30 30 100 100 98 94 100 100 97 91
30 40 100 100 99 95 100 100 98 94
30 60 100 100 100 97 100 100 99 95
30 80 100 100 100 98 100 100 100 96
40 20 100 100 98 94 100 100 96 92
40 30 100 100 99 95 100 100 98 93
40 40 100 100 100 97 100 100 99 95
40 60 100 100 100 98 100 100 100 96
40 80 100 100 100 98 100 100 100 97
40 100 100 100 100 99 100 100 100 98
60 30 100 100 100 96 100 100 99 95
60 40 100 100 100 98 100 100 100 96
60 60 100 100 100 99 100 100 100 97
60 80 100 100 100 99 100 100 100 98
60 100 100 100 100 100 100 100 100 99
100 40 100 100 100 99 100 100 100 98
100 60 100 100 100 100 100 100 100 99
100 80 100 100 100 100 100 100 100 99
100 100 100 100 100 100 100 100 100 100

TS: TECHNICAL SUPPORT
Lighting Research Laboratories, Inc.
Test Report No. LRL 397-3E, Date 3/5/97.
Description: Commercially Available 2' x 4' Troffer
2/32W T8 Lamps, 1/2" deep Parabolic Specular Silver Louver.
Luminary Watts = 60.2,
Catalog Number: Louver PL4 24 SPS
Lamp Type: F32T8/TL80, Lumens: 3050, Number of Lamps: 2

* Other testing results available upon request.

Total Luminaire Efficiency: 53.3%
Plane: 0 90
Spacing Criteria: 1.2 1.4
Shielding Angles: 33 33

Lighting Fixtures - Panel will sometimes require additional cutting for proper installation. Louver panels can also be specified with the Avoida-Notch optional frame - to specify add suffix-AN50 to the base catalog number. For color designation use B for black, W for white. For specular finish color designation should follow SP (i.e., G for gold, S for silver).

Lighted Ceilings - Louver panels are designed to fit any standard 1' x 4', 2' x 2' or 2' x 4' tee bar grid system.

Special Sizes - Special sizes are available, contact A.L.P.


ZONAL CAVITY COEFFICIENTS OF UTILIZATION

Ceiling Wall RCR

EFFECTIVE FLOOR CAVITY REFLECTANCE = 20

80 70 50 30 10 00
70 50 30 10 70 50 30 10 50 30 10 50 30 10 50 30 10 00
0 63 63 63 63 62 62 62 62 59 59 59 57 57 57 54 54 54 53
1 60 59 57 56 59 58 56 55 55 54 53 53 53 52 52 51 50 49
2 57 54 52 50 56 54 51 50 52 50 49 50 49 48 49 48 47 46
3 54 51 48 46 53 50 47 45 48 46 45 47 45 44 46 44 43 42
4 51 47 43 41 50 46 43 41 45 42 40 44 42 40 43 41 39 39
5 48 43 40 37 47 43 39 37 42 39 37 41 38 36 40 38 36 35
6 45 40 36 34 44 39 36 34 38 36 33 38 35 33 37 35 33 32
7 42 36 33 30 41 36 33 30 35 32 30 35 32 30 34 32 30 29
8 39 33 30 27 38 33 30 27 32 29 37 32 29 27 31 29 27 26
9 36 30 27 24 36 30 27 24 29 26 24 29 26 24 28 26 24 23
10 33 26 22 20 32 26 22 20 25 22 20 25 22 20 25 22 20 19

SPECULAR FINISH

CATALOG NO. DESCRIPTION DIMENSION
PL4 14SPS SPECULAR SILVER 11-3/4" X 47-3/4"
PL4 22SPS SPECULAR SILVER 23-3/4" X 23-3/4"
PL4 24SPS SPECULAR SILVER 23-3/4" X 47-3/4"

Products listed above are polystyrene. For Acrylic Louvers, add A after catalog number. DURABOLIC finish available on Specular Silver only. To order, replace SPS with DSPS. For other finishes replace SPS with SPG for Specular Gold* or SSS for Semi-Specular Silver.
*DURABOLIC Finish standard on Specular Gold.


ZONAL LUMEN SUMMARY

ZONE LUMENS % LAMP % FIXT
0-30 1319 21.6 40.5
0-40 2204 36.1 67.8
0-60 3253 53.3 100
0-90 3253 53.3 100
90-180 0 0.0 0.0
0-180 3253 53.3 100.0

LUMINANCE DATA IN FOOTLAMBERTS

ANG.
IN DEG.
AVG.
0-DEG.
AVG.
45-DEG.
AVG.
90-DEG.
45 2185 2645 3043
55 278 683 411
65 0 0 0
75 0 0 0
85 0 0 0

CANDLE POWER DISTRIBUTION

VER.
ANG.
HORIZONTAL ANGLE ZONAL
LUMENS
0.0 22.5 45.0 67.5 90.0
0.0 1623 1623 1623 1623 1623  
5.0 1615 1615 1612 1613 1607 154
15.0 1577 1581 1601 1622 1643 455
25.0 1446 1469 1531 1607 1621 711
35.0 1250 1310 1415 1508 1554 885
45.0 950 1041 1150 1274 1323 891
55.0 98 158 241 184 145 158
65.0 0 0 0 0 0 0
75.0 0 0 0 0 0 0
85.0 0 0 0 0 0 0
90.0 0 0 0 0 0 0

 

 



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