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2. Illumination illuminance refers to the brightness of the illuminated object, that is, the ratio of the luminous flux obtained to the surface of the object to the illuminated area. The unit of illuminance is represented by lux (1x) or foot candlelight. China is accustomed to use lux as the illuminance unit, which refers to 1lm The luminous flux uniformly illuminates the illuminance generated in an area of ​​1 m 2 . One foot candela refers to the illuminance produced by uniformly irradiating 1 lm of light flux over an area of ​​1 square foot. Between the lux and the foot can be converted, that is, 1 foot candle is equivalent to 10.761x, 1lx is equivalent to 0.0929 foot candle.
3. The intensity of light intensity The degree of lightness and darkness in chicken farms in the chicken industry is customarily referred to as the light intensity, which is the same as the meaning of illumination, and refers to the level of light in the back of the chicken. The light intensity can be measured directly with a photometer. Commonly used ST-III or similar spectrometers, depending on the approximate illumination range of different light sources, the range switch can be selected to measure the light intensity directly. Relevant data show that the outdoor light intensity at noon in summer can reach 60,000 to 100,000 lx, the outdoor light intensity without direct sunlight is 1000 to 10000 lx, and the light intensity in summer room is 100 to 550 lx. Therefore, when using natural day lighting, sometimes the light intensity in the house is too high, a shading device should be added. In addition, the illuminance in the house can also be roughly calculated by lamp wattage, lamp height, and lamp distance. For example, a bulb of 1W is usually used per area of ​​0.37m2, or a bulb of 2.7W per square meter is used. The lamp height is 2.1 to When the 2.4m is equipped with a good lampshade, it can roughly provide illumination of 1 foot candle, that is, 10.761x light intensity. However, it should be noted that due to the large number of factors that affect the light intensity of the chicken house, it is susceptible to factors such as the type, quality, voltage of the light bulb, and the reflective ability of the building materials, and the amount of light emitted and the amount of available light are different. Luminometer measurement is more accurate and reliable.
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1. Luminous intensity refers to the size of the light energy of various light sources, ie the intensity of the light emitted by the light source, rather than the brightness of the illuminated object. Therefore, the luminous intensity and illumination are two different concepts. The unit of luminous intensity is candlelight, and the light source differs in its candlelight value. If the ratio of the light source radiated by the light source to the time is expressed, the luminous flux, called the light source, has a unit of 1 m. It is a standard unit of light energy emitted by various types or sizes of light bulbs.