Commodity Axis Blue LED Light + Airstone uses low voltage LED lamps that are self-weighted for simple installation. These LED lights will help add a new dimension to your tank and illuminate your water! Great night light for nocturnal viewing LEDs illuminates the air curtain 100% Air pump not included The blue LED Lights and Airstone is perfect for night light for nocturnal peaking and comes with a transformer, two suction cup brackets and a wire suction cup.NOTE: Airstones cannot be linked together.