When plants breathe and act on photosynthesis, they will consume stored dry matter, most of which are sugars in the state of anaerobic respiration. This part of sugars is not only fructose that makes the fruit sweeter in a narrow sense, but also cellulose and starch that constitute the main body of vegetables, melons and fruits.

See photosynthesis of plants and the relationship between plants and spectra for details

The function of plant lamp is to increase the anaerobic respiration time of plant photosynthesis, increase the accumulation of dry matter or reduce the consumption of dry matter, so as to achieve the effect of early maturity, early listing and increase the yield of crops.

The respiration of plants is almost constant in a single day. In the evening, early morning, cloudy and rainy days and other low light conditions, the photosynthesis of plants is enhanced by supplementary light, so as to achieve the state of anaerobic respiration and enhance the accumulation of dry matter.

When there is no light at night, the illumination of lamps can enhance the photosynthesis of plants and balance the partial consumption of aerobic respiration, so as to reduce the consumption of dry matter.

If the respiration of plants per hour is 5, the effect of photosynthesis reaches 20 under sufficient light, and the net content of dry matter accumulation is 15, there is no need to supplement light.

Under the condition of insufficient light in cloudy and rainy days, the photosynthetic efficiency can only reach 5, and the respiration of plants can only reach a balanced state. There will be no accumulation of dry matter, and the crops will not grow. By increasing the illumination of fill light, the balance can be broken, the accumulation of dry matter can be realized, and the purpose of normal growth of crops can be achieved. The fill light effect of different lamps is different, Generally speaking, the greater the power wattage, the stronger the illumination intensity.

At night, when there is almost no light in the shed, the photosynthetic efficiency is almost 0. At this time, the plants carry out pure respiration, and the dry matter does not accumulate. Instead, it consumes 5 units per hour. Turn on the plant lamp to supplement light and increase photosynthesis. If the 100W plant lamp helps the crops increase 2 units of photosynthetic dry matter per hour, Then the net consumption per hour becomes three units.

By calculation, if it is sunny, the time of insufficient light in the morning and evening is 4 hours, the time of sufficient light is 10 hours, the light is turned off for 8 hours at night, and the light is replenished for 4-5 hours every day, the daily accumulation of dry matter without turning on the light is 55 units, while the daily accumulation of dry matter with turning on the light can reach more than 65 units, increasing the daily accumulation measurement by nearly 20%, The accumulated nutrition will eventually make the crops reach the market standard in advance, and increase the sweetness, survival rate and yield.