Aqua Illumination Blade Smart LED Strip Coral Grow 30inThe Coral Grow model brings a powerful and balanced blue and white growth spectrum with output in the deep blue through blue range (400 500nm) to address the photosynthetic needs of corals. Use the Grow for maximum PAR output per foot, and the Glow for maximum fluorescence, or mix them together and get both. Peak performance is best achieved in a 2: 1 Grow to Glow ratio, but one of each is perfectly acceptable when less light is needed.