Diode Dynamics 80mm HD LED Halos | WRX (15-21), BRZ (13-15), Genesis Coupe (10-16)HD LED Halos for 2015 2017 Subaru WRX (pair) HDHalo Technology. These HD LED halo rings have been designed from the ground up to be absolutely the brightest, most reliable halos physically possible. Each halo is populated with a large number of high density (HD) LEDs, which are then coated by a diffusing gel, resulting in a perfectly uniform light when turned on. When off, the diffusing gel hides the chips, resulting in a clean, OEM appearance.