Led Driver 600Ma 6W 10W 20W 36W 50W Constant Current Power Supply Transformer Constant Current LED Driver: They are known for their easy installation and are preferable because they supply the same amount of current regardless of how many or few lights are connected to it. For many LED applications, it is desirable to utilize constant current drivers. For example,LED Downlight,LED Ceiling Light,LED Display,Project-Light Lamp,Mining Lamp,Street Lamp,Floodlight,Spotlight etc If you want to buy more than 2 pcs led driver.Pls contact us to ask the best price. Kindly Reminder: Please be aware of the positive (anode +) and negative (cathode -) of led products, install accordingly to avoid damage. Do not exceed the maximum voltage or current,otherwise the led Diode may burn out or blinking.