With more than 130 white and amber LEDs per side, the inserts produce a bright white running light with amber turn signal that's virtually invisible when off Unit simply snaps in place with plug and play wiring for easy installation. When the turn signal is activated the white DRL running light turns completely off providing greater visibility to the amber turn signal Replaces OEM 57100151 (Left) and 57100152 (Right).. LIGHT FAIRING LWR INSERTS