The White And Yellow 12 Volt H11 Dual Color LED Bulb Pack is a specially engineered lighting solution that offers a 240-degree wide-angle dual color LED design. The primary 6500K white color temperature provides a bright 1400 lumen output, while the secondary 3000K bright yellow color temperature offers an LED 1150 lumen output. The small form factor in line LED driver ballast makes it easy to install, and it can be directly plugged into the H11 housing and socket. The bulbs come with a quality high temp rubber seal on the bulb body, and the white LED comes on by default. To switch over to yellow, simply turn off and on within 10 seconds. The yellow LED is designated for fog light use only and should not be used as a normal driving light. Sold as a pair with one white LED light and one yellow LED light, it features a highly efficient rear heatsink design to help dissipate heat.