i bought 4 l.e.d. strips 6'' each and was wondering on how to install them, ima put them by each seat where the light will hit the floor but i want them to turn on whenever i turn my headlights on, whats the safest way to install these with no electrical issues

 

This thread may help:

https://acurazine.com/forums/3g-tl-2004-2008-93/definitive-led-thread-all-youll-ever-need-know-about-leds-3g-garage-g-076-a-633045/

Have you searched at all? Lot's of stuff out there.