These bright lights are designed to fit into tight spaces with a compact design that doesn’t compromise performance. By engineering a high-density fin design, these bulbs stay as cool or even cooler than traditional LED bulbs with bulky heat sinks or messy braid designs. The light output is equally impressive with a total of 6, 000 lumens of cool white (6500K) illumination per pair using 20 watts per bulb. Kits are available in the most common headlight sizes. H4 dual-beam, Wattage:  20W per bulb, Total Length:  3. 1” (78. 2mm), Heat Sink:  1. 26” (32mm) diameter, IP Rating:  IP67, Output:  6000lm (pair), Color Temperature:  6500K, Good For:  tight applications, Operating Temperature:  -40° F to 176° F, Sold as pair.