Big Bike Parts has made many improvements to its popular fan cooled H4 LED bulb. They have managed to get more output, expanding to 3200 lumens in both high and low beam. The same bright white 6000K color temperature now has an all new die cast aluminum cooling fan. In addition to increasing lumens, Big Bike Parts has been able to build the LED driver into the housing removing the external driver from the cord. This makes for a very compact H4 LED that delivers 3200 lumens in a fan cooled unit. Truly outstanding and definitely keeps Big Bike Parts LED lighting a step above everyone else.