What light do I need to grow macroalgae?
For most marine macroalgae a full spectrum lighting is a great solution to keep them successful in the reef tank. In general, a lighting with a light colour spectrum between 5000k - 8000k is sufficient, whilst we recommend a 6500k lighting, which is great for most macroalgae species.
In our macroalgae data sheet, you will find information regarding the special needs of each individual macroalgae species.
We recommend 2-4 watts of PO or more per gallon of water in your marine aquarium setup which will be sufficient for most macro algae species in a standard depth tank.
While the light intensity is measured in output rather than watts, it is often very hard to determine the output of a particular light source, and therefore it is often more helpful to use watts as a more useful secondary measuring method.