If the LED lights are not turning on, try pushing down or reinserting the extendable rod into the bottom until you hear a "Beep" sound. Then press the "POWER" button to activate the lights. If the lights still does not work, please contact our customer service for assistance. Please note that while hydroponics system's light board is equipped with a nanocoating for water resistance, it is best to avoid direct contact with water to prolong the lifespan of the lights.