An LED transformer/driver is used to power low voltage (12v) LED bulbs and strip lighting. LED lighting requires a constant voltage to work properly. If you\'re using a non-LED compatible transformer, you may experience flickering, buzzing or reduced lifespan of your bulbs. 20% of the transformer capacity needs to be left over to prevent overloading. This particular transformer is suitable for when you\'re using dimmable bulbs. Please contact us if you’re unsure on compatibility.