Using these OLM fog light housings is a breeze. First, make sure your vehicle is from the Subaru WRX or STI series between 2015 and 2021 and has factory - installed fog lights. Since it's a plug - and - play setup, just connect the main light using the provided 12V wiring. You can then hook up the corona ring DRL halo to the power source of your choice; refer to the additional tab for power location ideas. When it comes to maintenance, keep the lights clean by using a soft cloth and mild cleaner. Avoid using abrasive materials that could scratch the surface. And always double - check the wiring connections periodically to ensure a stable power supply. Remember, these lights are sold as a pair, so install both for the best effect.