The outer ring of 24 white ProBEAM LEDs showcase a smooth white halo that functions as the running light while 12 center amber LEDs function as the turn signal. When a turn signal is activated the White LEDs turn completely off for the entire turn signal cycle providing greater visibility to the amber turn signal. ProBEAM Amber/White Dynamic Ringz LEDs with aluminum housing. 24 white DRL automotive grade LEDs per unit. 12 amber turn, automotive grade LEDs per unit. Aluminum bullet housing 2.4 Diameter x 3.0. Advanced reflector technology. 100% plug and play front turn signals.