Ltech SE-20-250-1000-W2D2, Quick Start Manual, Page: 3 / 4

IEEE 1789
0.1%
1%
5%
30%
40%
70%
90%
100%
10%
20%
50%
60%
80%
Frequency(Hz)
Modulation
(%)
1.00%
10.00%
100.00%
0.10%
1
10 100 1000
Modulation Area Diagram
High Frequency Exemption Area Diagram
Marks in the right chart were tested results of different current ranges.
The output frequeny is 0Hz in 100% brightness and its corresponding modulation
is 0%, which could not be shown in the right chart.
f
f
≤ 8Hz
≤ 10Hz
limit (%)
Exemption assessment
(High frequency exemption)
f
f
f
f
f
f
f
f
f
f
≤ 90Hz
≤ 90Hz
≤ 1250Hz
≤ 3125Hz
8Hz <
10Hz <
90Hz <
90Hz <
> 1250Hz
> 3125Hz
0.2
0.1
0.025
×
0.01
×
0.08
×
(0.08
/
2
.
5)
×
limit (%)
Limit of Modulation in low risk area
Limit of Modulation in no effect area
Waveform frequency of Optical output
Waveform frequency of Optical output
Exemption assessment
Brightness
10000 3125
Flicker Test Form
SE-20-250-1000-W2D2
www.ltech-led.com — 03 —
45
50
60
70
80
90
10 20 30 40 50 60 70 80 90 100
P
F
T
H
D
[%
]
0.35
0.45
0.55
0.65
0.75
0.85
0.95
10 20 30 40 50 60 70 80 90 100
250mA
250mA
250mA
300mA
300mA
300mA
350mA
350mA
350mA
400mA
400mA
400mA
450mA
450mA
450mA
500mA
500mA
500mA
550mA
550mA
550mA
600mA
600mA
600mA
650mA
650mA
650mA
700mA
700mA
700mA
750mA
750mA
750mA
800mA
800mA
800mA
850mA
850mA
850mA
900mA
900mA
900mA
950mA
950mA
950mA
1000mA
1000mA
1000mA
7
17
27
37
47
57
67
77
10 20 30 40 50 60 70 80 90 100
Relationship diagrams
Efficiency vs Load
Power Factor Characteristic THD vs Load
Load
【
%
】
Load 【 % 】
Load
【
%
】
E
ff
ic
ie
n
c
y
【
%
】
DALI
Push DIM/CCT
Installation Precautions
≥ 15cm
≥
15cm
≥ 15cm
≥
15cm
≥
15cm
Please do not stack the products. The distance between two products should be≥15cm so as not
to affect heat dissipation and the lifespan of the products. Please not place the products on LED drivers. The distance between the product and the driver
should be ≥15cm so as not to affect heat dissipation and shorten the lifespan of the products.