Company: AB Ludvig Svensson
Project Manager: Hans Andersson
AB Ludvig Svensson works with a Finnish company, Netled Oy Ltd., in developing integrated LED lamps for use in greenhouses. Around 20% of all commercial greenhouses in Northern Europe use artificial lighting to achieve better growth. The lamps that are commonly used are so-called discharge tube lamps. These provide good light for plants, but also plenty of light in wavelengths that elude the photosynthesis, in addition to a lot of excessive heat. If LED lamps are used instead, around 60 % of electrical energy can be saved while retaining the same levels of light. Another advantage with LED technology is that light diodes with different colour spectra can be used, thereby controlling the growth of the plants. That enables control of the shape of the plant as well as the speed of growth.
When using the kind of light that is presently used in the greenhouses, light sockets are installed at a height of between two and three metres, to spread the light evenly. Since many of the botanical cultures are tall and placed in rows with little space between, some plants shade others. LED lamps often emit weaker light, which means that the lights have to be placed closer to the plants, thereby distributing the light less evenly.
The product consists of a net with a width of about a metre, with integrated LED lamps in vertical suspension between the rows of plants and light in two directions. The LED lamps are thereby closer to the plants and spread to evenly distribute the light. Cultivation tests with the product will be carried out during the summer in greenhouses in Finland, in cooperation with Netled and the University of Tampere.