The freshwater pro t5 lamp has the highest colour temperature of all of arcadias freshwater aquarium t5 lamps at 6 600k and the most neutral colour renderingthe spectral output of the lamp has been tailored to closely resemble daylight while enhancing the greens of aquatic plantsr r extra high outputr bright white light with a soft green tintr excellent colour renditionr enhances the rich greens in plantsr supports aquatic plant life