The minimum PPFD requirement for your pepper plants is around 400 μmol/m²/s. It’s measured over an area and at a certain distance from the light source. PPFD is the quantity of useful light that your plants receive each second. To find how bright a grow light is, you need to look at its PPFD measurements. Peppers need grow lights with relatively high intensities. That will encourage strong vegetative growth. The light spectrum should also be somewhat rich in blue light. So, you need a grow light with a spectrum that is very rich in red light. One study showed that when pepper plants receive light that is 95% red, they produce the highest quantity of flowers. (Learn more about growing plants with lights.) Red light drives flower formation in plants. Heavy-flowering and fruiting plants need a lot of red light during their flowering phase. Those factors are spectrum, intensity, and efficiency.

There are many factors you should take into consideration when choosing a grow light for your pepper plants. There are hundreds of grow lights, and identifying the best ones can be challenging. People make many terrible mistakes at this step due to a lack of information. Choosing A Grow Light For Your Pepper Plants Your pepper plants will generally need between 14 and 16 hours of artificial light per day.īut a more specific answer to that question depends on the grow light you’re using. That means they need at least six to eight hours of direct sunlight each day.īut the question is, how many hours of artificial light do they need?

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