The new high power LED Sidellight bulb has been designed with 5 super light LEDs 2 on each side & 1 on top to produce maximum light output & lightness. The sidellight bulb matches HID replacement & original HID systems. These bulbs are used when your vehicle has a bulb warning system on sidellights & also those cars with Can bus systems like BMW Mercedes etc. This eliminates the requirement for resistors.