We bought a house with an array of broken (some cosmetic issues, some functional) downlights under cupboards in our kitchen. The bulb seem to be integrated into long wires and tracing them back up it seems there's a bunch of what I presume LED drivers on top of the cupboards. Should I be considering ripping everything out, reusing the existing LED drivers with new long-wired bulbs (unsure what they're called), or is this a non-DIY task for someone certified since it's not just replacing bulbs as I'd hoped?