Impact of LED emission on biological organisms is well known. State of the art literature indicated a reaction of cellular metabolism on different emission spectra, in particular on infra-red, combination of red and blue, blue and green, as well as other spectra of LED emission. There are developed technical recommendations for plants, there are considered influence not only of different spectra but also of different materials in physiotherapy. Investigation has been performed on impact of LED light on animal tissues, in particular rats. LED emission is also considered for treatment of acne, or psoriasis. Several works reported also about influence of LED on cognitive capabilities of computer users.

An important issue for LED light in horticulture concerns their economic viability. With advancing technology developments, LEDs are poised to become the light source with the highest electrical energy conversion ratio. LEDs might be used in greenhouses for lighting with selected wavelengths or for night breaks in off-season production of long-day crops. The use of red LED light to power photosynthesis has been widely accepted for two primary reasons. First, it is indicated that red wavelengths (600 to 700 nm) are efficiently absorbed by plant pigments; second, early LEDs were red with the most efficient emitting at 660 nm, close to an absorption peak of chlorophyll. They also saturated phytochrome, creating a high-Pfr photostationary state in the absence of FR or dark reversion.

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Impact of LED light and weak EM-fields on animals/honeybees

In this a new internal project, based on bilateral and trilateral cooperation, we explore a new approach for impacting vegetable organisms in horticultural production.