The influence of different lighting sources on growth and development of tomato plants

Comparative study was conducted on morphofunctional parameters of tomato plants (Solanum lycopersicum L.) under diverse supplementary lighting conditions – electrodeless lamps (EL), high-pressure mercury arc lamps (HPM) and high-pressure sodium arc lamps (HPS). The work showed, that plants, cultivated under 5,000 lux EL lighting, had higher morphometric parameters, their leaves contained more chlorophyll, and they were outgrown, in comparison to plants, growth in HPS and HPM lighting conditions. These results demonstrate the profitableness of EL light flux, which contains constant PAR spectrum, for tomato plants growth and development