I purchased an LED low-beam conversion kit and installed it yesterday in my 2010 Forester. The installation was easy enough, other than having to move the battery to get enough space to fit my headlight.
However, I am not sure whether I've done an adequate job attaching the ballasts (the square-ish metal bricks that convert the regular headlight power connection, and limit the current, to what the LED lights need). I read this Instructable which recommended double-stick-tape, which I used - but I'm not convinced this is going to hold for years.
Is double-stick-tape a secure way to mount this? Is there a better option that I would have at home (I'm at the 'change oil and headlights' level of mechanical ability with cars, but not beyond that)? Should I ask my mechanic next time I take it in for something else to attach it better?
If relevant, both ballasts are currently secured to a metal part of the frame, below the headlights. The Forester has tiny dust covers behind the headlight bulbs (just round caps maybe 5" diameter and less than an inch tall) which I'm not able to use because the bulb (with the heat sink) is too long, so I can't attach to those like the Instructable recommends.