Led lights

Asked November 8, 2019, 8:12 AM EST

I start seeds in the winter for tomatoes, peppers and cucurbits. I have been using fluorescent lights but want to consider led for efficiency and safety (no balast to heat up). What is your recommendation for lumens and K value for these young plants.

Washington County Minnesota

1 Response

Much information is available for use of fluorescent lights for home owners due to the fact that these are inexpensive. I've included links below with general information about use of grow lights. For LED lights, the wavelength needed is between 400 -700nm. Plants can do well with the blue spectrum (chlorophyll production), and red and far red(growth and flowering). Some of the recent research evaluates not lumens but PPF (photosynthetic photon flux) or PPFD ( photosynthetic photon flux density)for LED lights. See the links below for additional information. Light needs of the plants and amount of growing space influence the number of watts needed. http://pods.dasnr.okstate.edu/docushare/dsweb/Get/Document-10413/HLA-6450web.pdf https://extension2.missouri.edu/g6515 https://extension.umd.edu/hgic/topics/grow-lights