Does the brighter the fishing light, the better the fish effect?
Before we get into that, let’s talk a little bit about brightness and illuminance.
Luminance refers to the physical quantity of luminance (reflection) intensity on the surface of luminous body (reflector). The human eye observes the light source from one direction, and the ratio of the light intensity in this direction to the area of the light source “seen” by the human eye is defined as the unit brightness of the light source, that is, the luminous intensity on the unit projected area. The unit of brightness is Candela per square meter (cd/m2). Brightness is a person’s perception of the intensity of light. It’s a subjective quantity. When discussing the topic of fish lamp, because the light is mainly aimed at fish eyes, I think it is inappropriate to use brightness to evaluate 1500w metal halide fishing lamp. Instead, we should use radiation brightness, or radiance for short.
Radiation luminance is a physical quantity that represents the radiation intensity of a point on a surface radiation source in a certain direction. Refers to the energy radiated by the radiation source on unit area and unit solid Angle through the vertical plane element normal direction in unit time, that is, the radiation flux of the radiation source on unit projected area and unit solid Angle. The unit is watts /(spheroidium m 2)
Illuminance usually refers to the intensity of light, which refers to the flux of visible light received per unit area and is measured in Lux or Lx. When the luminous flux over an area of 1 square meter is 1 lumen, its illuminance is 1 lux. 1Lux=1Lm/m2. Obviously, the concept of illumination is also based on the subjective perception of the human eye. When evaluating metal halide squid fishing lamp, radiant illumination should be used. Radiant illuminance, also known as irradiance, is the radiant flux on the unit area of the exposed surface, in watts per square meter (W/ square meters). However, the current research data on phototaxis of fish are mostly based on illuminance related to human vision. In this discussion, data and units related to human vision are still used, which should be properly adjusted according to wavelength and other factors in actual use.
Generally speaking, most high wattage Underwater fishing lights at night the appropriate illumination is not more than 20Lux, illumination is more than 0.01Lux is attractive to fish. If 30% of the light of the halogen lamp is illuminated towards the sea, then half of the light can enter the water considering the Angle. The total number of lumens in the light system of the boat is about 21 trillion lumens, which means that the number of 1000 watt metal halide lights is about 200 to 300. Continue to increase the number of fishing lamp, improve the brightness of the lamp boat, to improve the effect of fish collection is not much help!! (unless the power and number of lights are increased at the same time, raising the height of the hanging lights).
Where are the shoals estimated to stay? If the lights are all on for long enough, the fish will stay about 100 meters away and generally won’t come any closer.
The result of the discussion of the second topic: the total number of lumens of the light boat lighting system is about 21 trillion lumens, that is, the number of 1000W gold halide lights is about 200-300. Continue to increase the number of fish lamp, improve the brightness of the lamp boat, to improve the effect of fish collection is not much help!! (unless increasing the power and number of lights at the same time, raise the height of the hanging lights, and change the Angle of the hanging lights).
Post time: Apr-13-2023