The Original Tropical Lamp T5 is designed specifically around the red and blue wavelengths in daylight that are necessary for photosynthesis.This give a warm pink light that encourages plant growth and highlights the iridescence of many tropical fish. The spectrum created also has the effect of highlighting the fluorescent features of fish such as neon and cardinal tetras, platys and guppies, bringing out and enhancing their highly attractive natural colours, making them appear to shine even more brightly. The lamp tends to have a purple/pinkish tinge, which creates a very warm appearance in the aquarium, which many aquarists are familiar with.The two wavebands which optimise both photosynthesis and chlorophyll synthesis have been enhanced in the Arcadia Original Tropical lamp. The effect of these wavebands is to actively promote healthy and well-balanced plant growth. The lamp also has the effect of bringing out the red and brown colours which often occur in aquarium plants such as ludwigia. Warm tropical colour Accentuates reds and blues Optimum light for photosynthesis Promotes plant growth