Cut Sheet

Coefficients Of Utilization –
Zonal Cavity Method
RC %: 80
RW %: 70 50 30 10
RCR: 0 119 119 119 119
1 108 103 98 94
2 98 89 82 76
3 89 78 70 63
4 81 69 60 53
5 75 61 52 45
6 69 55 46 40
7 64 50 41 35
8 59 46 37 31
9 56 42 34 28
10 52 39 31 25
Effective Floor Cavity Reflectance:20%
Average Luminance Table (cd/m
2
)
Vertical Angle
Horizontal Angle
0° 45° 90°
45° 1,039 19,163 20,656
55° 1,700 18,710 21,149
65° 3,018 18,826 22,574
75° 10,990 19,707 24,586
85° 6,482 16,515 16,392
Zonal Lumen Summary
Zone Lumens % Lamp Luminaire
0-30 1,039 N/A 26.1%
0-40 1,700 N/A 42.7%
0-60 3,018 N/A 75.8%
0-90 3,980 N/A 100%
0-180 3,982 N/A 100%
Photometry
ZR2440L83010V5UNV BASED ON TEST REPORT #: STD200105NBCB
Luminaire photometry has been conducted in accordance with IES LM-79-08. IES LM-79-08 specifies the entire luminaire as the source resulting in a luminaire efficiency of 100%.
0˚
20˚
50˚
70˚
419
0
1676
838
1257
0˚
90˚
90˚
ZR LED Troffer
Reference https://www.creelighting.com/products/indoor/troffers/zr-series for detailed photometric data.
Open Space
Spacing Lumen Package Initial Delivered Lumens Wattage LPW w/ft
2
Average fc
8 x 8
30L 3,470 26 133 0.39 50
40L 4,050 29 140 0.44 59
50L 5,650 41 138 0.62 82
60L 6,100 44 139 0.66 88
70L 6,750 47 144 0.71 98
80L 8,200 62 132 0.93 119
100L 10,050 74 136 1.11 146
8 x 10
30L 3,470 26 133 0.33 41
40L 4,050 29 140 0.37 48
50L 5,650 41 138 0.53 66
60L 6,100 44 139 0.56 72
70L 6,750 47 144 0.60 79
80L 8,200 62 132 0.79 96
100L 10,050 74 136 0.95 118
10 x 10
30L 3,470 26 133 0.26 33
40L 4,050 29 140 0.29 38
50L 5,650 41 138 0.41 54
60L 6,100 44 139 0.44 58
70L 6,750 47 144 0.47 64
80L 8,200 62 132 0.62 78
100L 10,050 74 136 0.74 95
10 x 12
30L 3,470 26 133 0.21 26
40L 4,050 29 140 0.24 30
50L 5,650 41 138 0.33 42
60L 6,100 44 139 0.36 46
70L 6,750 47 144 0.38 51
80L 8,200 62 132 0.50 62
100L 10,050 74 136 0.60 75
Application Reference
10' ceiling: 80/50/20 reflectances; 2.5' workplane, open room. LLF: 1.0 Initial
Open Space: 50' x 40' x 10
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®
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