If this pump has a integral float, thats part of the pump you wont have access to the switched side of the float and wont be able to wire a light to come on with the pump, if the switch wires does come up to the power connection then wire the light with the motor (parallel)
I do small lift stations two different ways, one is to use a Arlington post with a single 20 amp receptacle/ with a inuse cover, just outside the pit, <<<it last the longest, if I have to install a receptacle in the pit(owner don't like the post), I use a cord cap filled with dielectric grease (both front and back) and plug in the float and pump. in small tanks single pump, we always get pumps with plugs on the cord, I don't cut them off as it can void the warranty.
For commercial installations, the pump almost always comes with stripped cords, as well as the floats, there is always 3 to 4 floats (lead, lag, bottom stop, and high alarm which is some times combined with the lag)
these are almost always piped from the pit to a control box, and sealed for air between the tank and control box, we use almost all SS R3 cabinets. and if not supplied build our own controls with alternating relay to share the pump load, along with hour meters or cycle meters or both and such.
Cell link monitoring with subscriber service is done by others.
So far I have never been required to go explosion proof, the only reason we air block is to keep the fumes out of the controls, as on cold mornings the moisture from the pit will condensate all over the inside of the control panel and corrode everything, and while working in the panel it helps keep the smell out