The fill light in the surveillance camera is a fill light method, which is used to improve the situation that the light in front of the subject is insufficient when the subject is in the backlight!
This kind of fill light lamp is generally made of high brightness light emitting diode (LED), which has the characteristics of stable operation, low calorific value, low energy consumption and long service life! As for the parameters, such products are generally not clearly marked! However, you can identify the highlighted LEDs by referring to their performance parameters!
At present, the commonly used high-brightness LEDs are all 5mm!
Main parameters: model: 5mm
Luminous color: white
Wavelength range:
Appearance color: color diffusion
Normal working voltage: 2.9-4.0V
Maximum reverse voltage: 5V
Forward current: 20mA
Reverse current: 10μA A
Brightness: 1500-20000
Angle: 30-40 degrees
In addition, there is a relatively new high brightness diode, which is used for traffic lights.
Model: HW220-G
Luminous color: white
Appearance color: white and transparent
Normal working voltage: 3.0-4.2V
Maximum reverse voltage: 5V
Forward current: 250 mA
Reverse current: 10μA brightness: 20000-25000
Angle: 60-80 degrees
Application scope: backlight, large screen display