Aquarium Antarctic Pro-Marine Blue 18Watt 600mm T8 tube. The Antarctic Pro lamp range has been designed to light in the actinic range peaking at 420nm which is essential for the survival and health of fish, corals and invertebrates in MARINE aquariums. An important aspect of this lamp is the UV output. This creates a very pleasant effect on corals, invertebrates and exotic marine fish. When used at night with no other lamps the effect is of a dark moonlit night with the vivid colours of corals, invertebrates fluorescing brilliantly.