SYLVANIA's GRO-LUX Aquarium fluorescent lamps provide the essential energy for use in indoor gardening applications. Light provides the energy that plants need to produce food and other substances required for growth and flowering. GRO-LUX Aquarium lamps provide the right balance of red and blue wavelengths that are most beneficial for these essential processes. Photosynthetically Active Radiation (PAR) varies according to the cultivar grown.