EFFECT OF SUPPLEMENTARY LIGHTING TOMATO SEEDLINGS METAL-HALIDE AND HIGH PRESSURE SODIUM LAMPS ON SELECTED PHYSIOLOGICAL PARAMETERS OF PLANTS Journal title: Proceedings of Electrotechnical Institute Prace Instytutu Elektrotechniki Authors: Katarzyna KOWALCZYK, Janina GAJC-WOLSKA, Dawid BUJALSKI, Monika MARCINKOWSKA, Lucyna HEMKA Subject(s):