For electrics, you can never have too many power-points/sockets. It is always possible to use trailer sockets/power cords, but wall sockets are much more convenient. I have banks of 4 sockets around the workship (I often use up to 3 at a time in one place. These are about 300mm above bench height. One set in each corner, and two additional sets on each wall.
I have two runs of strip lights, each is about 500mm in from the sidewalls, that way I have multi-directional light and I am never working in my own, or any, shadow.
My floor was concrete, not ideal, and I painted it with a two part resin paint. This is non-slip and easy to sweep. I also stand on some thick exercise mats next to the bench, these are warmer and have some give. A wooden floor is always better, unless you are going to have very heavy machinery.
Bench height is about 800 mm. The same as most of our kitchen, but I am not tall. One rule of thumb I saw was that if you stand up, and hang your arms by your side, the bench should be at wrist height, or thereabouts. Many benches are 800mm or more deep, if you have a small workshop this can be tight. My bench is 600mm only, and is more than enough for most carpentry jobs, modelling jobs are smaller. I also have the bench on 75mm/3 inch wheels, so that I can pull it out from the wall and work on all sides of a job.
Not all of my power tools are full size, because of space limitations. I have a 10 inch bandsaw, mounted on a wheeled cabinet, so that it can be moved around as needed. I also have something called a 'mini drill', it is like a slightly undersized drill press, that only weighs 9kg. Even a small drill press can be nearly 30 kg. At only 9kg the mini-drill is easy to put away and does not need permanent bench space.