With a name like AquariumSumps.com we take Refugium Lighting seriously. We have been using natural filtration on all of our tanks for over 30 years. For those that are new to the hobby that means using macroalgae, live rock, and sand as a way to keep your tank water crystal clear. Macroalgae is one of the most heavily used forms of natural filtration because it does an amazing job removing harmful nutrients such as Nitrates and Phosphates from your aquarium. Like any other plant though, macroalgae needs proper lighting. The better the lighting the better your refugium will perform. We advise against using cheap bulbs or lights in hopes it will do a sufficient job making your refugium perform. This is why we created the Refugium Lighting page. We wanted to specifically help your aquarium runs at its best. Should you have any questions don't hesitate to reach out to us on our Contact Us page.