Since an LED is an “electronic bulb”, the driver is a self-contained power supply that has outputs matched to the electrical characteristics of your LED. Because each bulb has a driver, if an LED should fail in a circuit, the next one in line will run at the same wattage and voltage with very little amp draw as the one before it. A tungsten or halogen bulb will tend to draw more amps in this case, causing the bulb to burn hotter than it’s rating and quickly fail .