Cut Sheet
BLT2X4
COMMERCIAL INDOOR: One Lithonia Way Conyers, GA 30012 Phone: 800-705-SERV (7378) www.lithonia.com © 2016-2022 Acuity Brands Lighting, Inc. All rights reserved. Rev. 02/28/22
2BLT Volumetric Recessed Lighting 2'x4'
Enabled by the embedded nLight control, the BLT actively tracks its run-time and manages its light source such that constant
lumen output is maintained over the system life. Referred to as lumen management, this feature eliminates the energy waste
created by the traditional practice of over-lighting.
Constant Lumen Management
PHOTOMETRICS
2BLT4 40L ADP LP835, 4000 delivered lumens, test no. ISF36900P109, tested in accordance to IESNA LM-79
2BLT4 48L ADP LP835, 4960 delivered lumens, test no. ISF 36900P117, tested in accordance to IESNA LM-79
0° 20°
40°
60°
80°
90°
0°0°0° 90°
180°
200
400
600
800
1000
1200
Coefficients of Utilization
pf 20%
pc 80% 70% 50%
pw 70%50%30% 50%30%10% 50%30%10%
119
108
97
88
81
74
68
63
59
55
52
119
102
88
77
68
61
55
50
45
41
38
119
97
81
69
59
51
45
40
36
33
30
116
100
86
76
67
60
54
49
44
41
38
116
96
80
68
58
51
45
40
36
33
30
116
92
74
61
52
44
39
34
30
27
25
111
96
83
72
64
57
52
47
43
40
37
111
92
77
66
57
50
44
39
36
32
30
111
89
72
60
51
44
38
34
30
27
25
RCR
0
1
2
3
4
5
6
7
8
9
10
Zonal Lumen Summary
Zone Lumens % Lamp % Fixture
0° - 30°
0° - 40°
0° - 60°
0° - 90°
90° - 120°
90° - 130°
90° - 150°
90° - 180°
0° - 180°
1024
1669
2960
3998
2
2
2
2
4000
25.6
41.7
74.0
100.0
0.0
0.0
0.0
0.0
100.0
25.6
41.7
74.0
100.0
0.0
0.0
0.0
0.0
100.0
CP Summary
0° 90
0°
5°
15°
25°
35°
45°
55°
65°
75°
85°
90
1325
1309
1250
1136
981
797
601
408
212
48
1
1325
1325
1278
1187
1058
909
761
621
460
197
17
0° 20°
40°
60°
80°
90°
0°0°0° 90°
180°
300
600
900
1200
1500
Coefficients of Utilization
pf 20%
pc 80% 70% 50%
pw 70%50%30% 50%30%10% 50%30%10%
119
108
97
88
81
74
68
63
59
55
52
119
102
88
77
68
61
55
50
45
41
38
119
97
81
69
59
51
45
40
36
33
30
116
100
86
76
67
60
54
49
44
41
38
116
96
80
68
58
51
45
40
36
33
30
116
92
74
61
52
44
39
34
30
27
25
111
96
83
72
64
57
52
47
43
40
37
111
92
77
66
57
50
44
39
36
32
30
111
89
72
60
51
44
38
34
30
27
25
RCR
0
1
2
3
4
5
6
7
8
9
10
Zonal Lumen Summary
Zone Lumens % Lamp % Fixture
0° - 30°
0° - 40°
0° - 60°
0° - 90°
90° - 120°
90° - 130°
90° - 150°
90° - 180°
0° - 180°
1270
2070
3671
4957
2
2
2
2
4960
25.6
41.7
74.0
100.0
0.0
0.0
0.0
0.0
100.0
25.6
41.7
74.0
100.0
0.0
0.0
0.0
0.0
100.0
CP Summary
0° 90
0°
5°
15°
25°
35°
45°
55°
65°
75°
85°
90
1643
1623
1550
1409
1217
988
745
505
263
59
1
1643
1644
1585
1472
1312
1127
943
769
571
244
21
01020304
05
0
THOUSAND OPERATING HOURS
01020304050
THOUSAND OPERATING HOURS
POWER INPUT
LIGHT
OUTPUT
100%
80%
100%
80%
34W
27W
34W
27W
LIGHT OUTPUT
LIGHT OUTPUT
POWER INPUT
POWER INPUT
Without Lumen Management
Energy is wasted and light level is inconsistent.
POWER
INPUT
LIGHT OUTPUT
With Lumen Management
Energy is saved and light level remains consistent.
Wasted Energy
Saved Energy
01020304050
THOUSAND OPERATING HOURS
01020304
05
0
THOUSAND OPERATING HOURS
POWER INPUT
LIGHT
OUTPUT
100%
80%
100%
80%
34W
27W
34W
27W
LIGHT OUTPUT
LIGHT OUTPUT
POWER INPUT
POWER INPUT
Without Lumen Management
Energy is wasted and light level is inconsistent.
POWER
INPUT
LIGHT OUTPUT
With Lumen Management
Energy is saved and light level remains consistent.
Wasted Energy
Saved Energy