In winter, due to the decrease of light, we recommended the plant lighting lamp in the previous article. However, we found that people are not very familiar with the plant lighting lamp, and there are some misunderstandings and purchasing problems, so today we have a special topic to talk about the things about the plant lighting lamp!
Photosynthesis we should not be unfamiliar, which is the most adequate medium factor is light, why most plants in spring, summer and autumn grow very well, in addition to the temperature impact of light, of course, there are differences between the northern and southern hemisphere! The light may change due to climate and environmental changes, so the plant growth lamp is to artificially provide light needed by plants in the case of insufficient natural light, to promote their photosynthesis!
LED lights, which consist of a combination of red and blue chips, turn purple when the two colors are mixed because of the lack of other spectra. The light emitting principle mainly takes advantage of the difference in energy between the electron and the hole after the PN junction is energized and emits different photons (those who have studied analog circuits in university should know). In addition, the output lumen of the LED itself is not high, and the frosted lampshade will lose some lumen. The LED can only work if it is as close to the plant as possible, which means that the LED is not suitable for hanging high in the outdoor greenhouse.
Take dendrobium for example, the most suitable light for the growth of dendrobium is 60-80umol. 20WT8 tubes are about 30umol at a distance of 10cm, so at least three tubes are needed side by side. (So leds are better for plants)
