Marine aquariums need to be well lit because your fish, invertebrates and corals need enough light to live. Anemones, for example, even get a large part of their nutrition from there. Which lighting you need will of course depend on your aquarium and the livestock you keep in it.
Dutch Reef supplies many different types of aquarium lighting such as LED, TL, and Hybrid. In addition, you can always contact us if you have any questions. We are happy to talk to you about the right lighting for your seawater aquarium.