The Gavita® RS 1900e produces 1900 µmol s-1 PAR and an impressively efficient 3.0 µmol/j and delivers a broad white light with an enhanced blue spectrum, which some studies show may intensify secondary metabolites, such as terpenes and cannabinoids. This powerful, full-spectrum light source is intended for full-term plant growth - from the vegetative stages to higher-light-requiring bloom and finishing stages. Using the Gavita Master EL3 Controller (sold separately), the fixture is dimmable to 10%.