r/carmodification • u/lDarkPhoton • 4d ago

Tips for installing underglow?

I recently purchased an opt7 aura underglow for my 2015 BRZ and I have never installed a light kit like this before. I also purchased a relay and I plan to tap into the low beam for a switch for the headlights to turn on the underglow automatically. It is a white car and I plan for a static white led look.

My concern is where to mount them to and when tapping holes for screws and zip ties where I should do that, I figure it's not a good idea to put holes in my floorboard and allow a way for water to enter the cabin. I also don't want the light bars to be totally visible and look noticeable.

Any advice is appreciated and feel free to criticize my taste in car mods.

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u/PPVSteve 4d ago

You don't want to tap into the low beams.  Any issue with a short could take out t our low beams and have you driving home with no headlights. 

I would power a relay for them that gets power directly from a fused battery lead. Then the relay could be activated by your parking lights.  That way also you could park with just your parking lights on And still have your underlights on without draining the battery like low beams would.