Supplementary lighting is an artificial lighting source used in green house to get sufficient light quantity and quality. Supplemental lighting extends the hours in a day.
Do we require supplemental light in green house?
Greenhouse requires certain amount of lights for particular time period depends on plants, if this can’t be done naturally then we have to provide supplementary lighting. Supplemental lighting is the use of multiple, hight intensity light source to promote plant growth. Supplemental lighting is used in greenhouses to increase crop production during time periods with low levels of solar radiation. These time periods usually occur during the winter months and during the cloudy time in rainy season. For long day plants sometimes, we have to give very low light intensity for longer duration such type of lighting is called photo- periodic lighting.
How to calculate supplemental lights?
Supplemental light: Plant lighting requirement (DLI) – Available DLI from sunlight