Aquarium with water, what lamp is good, LED lamp?
Nothing is best, but only the best. For deep cylinders, very good halogen light, shallow cylinder is wasted. Therefore, the choice of lamps should be based on the actual situation.
LED can be used, but must use 3W beads of high-power LED lamp, water depth of more than 40 cm, positive SOD do not use.
Now many of them are led, mostly red and blue.
