What is a fill light?

The so-called fill light lamp is a kind of special lighting equipment that uses specific light to project on the illuminated object to directly or indirectly achieve the purpose of fill light. Generally speaking, there are two kinds of fill light. The first one is plant fill light (also called greenhouse fill light or plant promotion light), and the second one is monitoring fill light (also called security monitoring fill light or electronic police fill light). When it is used to promote plant photosynthesis, it can directly supplement light; When it is used to improve the ambient illumination and low illumination of the camera, it is the specific light that illuminates the scene to be shot and makes the camera shoot a good picture, which is an indirect light supplement. The light sources of the fill light usually include LED, metal halide lamp, fluorescent lamp, high-pressure sodium lamp, incandescent lamp, iodine tungsten lamp, xenon lamp (HID) and so on. Classification of fill light lamps According to light sources, fill light lamps can be divided into traditional light source fill light lamps and LED fill light lamps. Traditional light source fill lamps generally use metal halide lamps, fluorescent lamps, high-pressure sodium lamps, incandescent lamps and iodine tungsten lamp as light sources. LED fill light lamp uses LED as light source. In addition, there is a special fill light called strobe fill light, which uses xenon lamp (HID) as light source and is a special fill light for electronic police system. Working mode of fill light Generally speaking, fill light has several working modes, such as constant light, light control, time control, strobe and so on. Xenon fill light lamp works in stroboscopic mode because of its large calorific value and short working life. What are the advantages and disadvantages of each? The traditional light source fill lamp has simple structure and low cost, but it consumes a lot of electricity, has short service life, is polluted by heavy metals and is frequently maintained, and is gradually replaced by LED fill lamp. LED fill light lamp has low power consumption, good monochromaticity, high electro-optical conversion rate, low carbon life, good stability and long service life, but its cost will be higher than that of traditional light source. The use of fill light lamps is mainly used for agricultural planting and safety monitoring. Fill the light in planting, which is used to fill the light for plants in greenhouse or rainy day. By supplementing light, the photosynthesis of plants is controlled, so as to improve the yield and quality of plants, realize the adjustment of plant maturity, enhance the ability of plants to resist pests and diseases, and improve the economic benefits of planting. The fill light in the security monitoring industry is mainly used in electronic police, intelligent transportation, bayonet systems, toll stations, factories, safe cities, communities, banks, warehouses, museums, factories and mines, oil fields, prisons, border defense and so on. It can provide auxiliary lighting for the camera night vision monitoring system, effectively illuminate the monitoring scene, solve the phenomenon of virtual focus, dim and noise caused by insufficient lighting at night, and restore the high-fidelity color of the camera. How to choose fill light lamp is based on the characteristics of light source. LED fill light lamp should be selected in general application, and red and blue LED is mainly used as light source for plant fill light lamp. It is necessary to adjust the ratio of red light to blue light and the power of the fill light according to the growth characteristics and growth environment of plants. The application field of security monitoring industry is mainly to select the appropriate LED fill light according to the site environment and monitoring purposes. When installing video surveillance in residential areas, in order to reduce light pollution and avoid disturbing residential areas, infrared LED fill light lamps can be selected.