Interpet LED Kids Single Row Lighting System 20cm (7.8in) The Interpet Single Row Lighting System is safe, reliable, fully submersible & very easy to install into most small aquariums. It cycles through multiple shades of blue, violet, red, white & green & can be stopped on any colour. Included is- 7.8in (200mm) single tube, low profile transformer with inline switch, inline colour control button, multipurpose fitting brackets & instructions. Suitable for Coldwater or Tropical Aquariums.