I couldn't view the pics, imgur doesn't work on my device, but I've got some professional experience installing undercabinet and also regular, socket lights that's probably helpful here. I would NOT ever put a regular fixture above a sink, could be pretty dangerous if it gets really wet and is very probably a code violation (water+power=no bueno.) That said, it's dirt simple and cheap to do this RIGHT, needs just 3-4 tools and 2-3 parts, and afaik It's 100% legal to do it yourself anywhere in North America. Get a proper, waterproof/wet location junction box you can hide in the cabinet (we would put ours in the top, back corner of the lowest, closest cabinet and screw it into the WALL where the wires won't pinch or bend too hard coming out) and a prettier, waterproof, led light for in there. Lights can be had from Amazon for a song these days, just ensure it says waterproof or outdoors and has sold many units (thousands+.) Then watch at least 3 different YouTube videos detailing the steps to install it. I strongly advise you to break the project down a little when you go looking for vids and be as specific as possible in finding a good match for what you're doing and the products used, watch some waterproof junction box install vids, install yours, watch some (insert model or type of prettier light purchased here) install vids and do yours.