Improper or insufficient aquarium lighting causes fish stress,lessened activity and coloration and poor growth in aquatic Plants and health in fish and invertebrates.The goal of fish tank lights is to replicate the natural conditions of light in natural habitats.Most aquarium fishes need up to 12 hours a day of the appropriate level of daylight, and it's up to you to give them normal days and nights as they don't have any other way to normalize behavioral cycles (like spawning or even feeding). At Indohobby, we have reliable aquarium lighting fixtures of LED,PL,Metal Halide,T8,T5 Tube Bulb and fixture set supplied by World's renewed aquarium lights manufacturer for every type of habitat and any aquarium lighting accessory needed to complete your Aquarius set up.