Specification Sheet
P66-EBFB WITH P8031-28FB
Report No. 98178
No. Lamps: 2 Type Lamp: 26W CF QUAD-GE Total Lumens: 3400
Fixture Efficiency: 35.8%
S/MH Ratio: 0.9 (0˚) 1.1 (90˚)
Single Fixture Data
Ceiling
Ht.(Ft.)
10% Values
Ft.-C Beam Dia.
Zero
Degrees
Ft.-C
50% Values
Ft.-C Beam Dia.
Ft.-C (Footcandles) are initial and measured 2’-6" from floor
16 0.4 28 4.2 2.1 13
14 0.6 24 5.8 2.9 11
12 0.8 20 8.5 4.2 9
10 1.4 16 13.6 6.8 7
8 2.5 11 25.2 12.6 5
Beam Angle - 92˚ Beam Angle - 53˚
Quick Calculator Charts
0 100 200 300 400 500
0
8
16
24
32
40
Initial Footcandles
2’6" from floor
Area per Fixture (sq. ft.)
Room Reflectances: 80% Ceiling, 50% Wall, 20% Floor
Ceiling Ht.= 9 ft.
Medium Room - RCR=5.0
120 to 200 square foot area
0 100 200 300 400 500
0
10
20
30
40
50
Initial Footcandles
2’6" from floor
Area per Fixture (sq. ft.)
Room Reflectances: 80% Ceiling, 50% Wall, 20% Floor
Ceiling Ht.= 10 ft.
Large Room - RCR=2.0
1500 to 2500 square foot area
5˚
15˚
25˚
35˚
45˚
55˚
65˚
75˚
85˚
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
DISTRIBUTION CURVE INTENSITY DATA
763 763
733 765
681 760
641 719
574 680
481 634
404 542
330 462
247 395
178 302
132 211
107 160
95 125
79 92
58 63
37 41
23 26
11 13
0 0
70 50 30 10 70 50 30 10 50 30 10 50 30 10 50 30 10 0
80 70 50 30 10 0
RW
RC
10
9
8
7
6
5
4
3
2
1
0
Effective Floor Cavity Reflectance 0.20
ZONAL CAVITY COEFFICIENTS OF UTILIZATION
43 43 43 43 42 42 42 42 40 40 40 38 38 38 37 37 37 36
40 38 37 36 39 38 37 36 36 35 34 35 34 33 34 33 32 32
37 35 33 31 36 34 32 31 33 31 30 32 30 29 31 29 29 28
34 31 29 27 33 31 28 27 30 28 26 29 27 26 28 26 25 25
32 28 26 24 31 28 25 23 27 25 23 26 24 23 25 24 23 22
30 26 23 21 29 25 23 21 25 22 21 24 22 21 23 22 20 20
28 24 21 19 27 23 21 19 23 20 19 22 20 19 22 20 18 18
26 22 19 17 25 21 19 17 21 19 17 21 18 17 20 18 17 16
24 20 17 16 24 20 17 16 19 17 15 19 17 15 19 17 15 15
23 19 16 14 22 18 16 14 18 16 14 18 16 14 17 15 14 14
22 17 15 13 21 17 15 13 17 15 13 17 15 13 16 14 13 12
P66-EBFB