Refugium Bulb

[Bert]

Red is favorable for photosynthesis, especially in plants than run on chlorophyll a because they are best able to use red and blue. so you can grow land plants on red light, blue light or best of all, a mix of red and blue (like those plant grow bulbs you see). Unforunately, humans see greens best so we can't appreciate the brightness of a plant gro bulb.

Bert