The answer to 'difference between lighting installation' is that there are two main types of lighting installation: hardwired and plug-in. Hardwired lighting is permanently connected to the home's electrical system, while plug-in lighting uses a power cord that plugs into an outlet.
Hardwired lighting is typically more complex to install but offers a seamless, permanent solution. Plug-in lighting is easier to set up and can be moved around, but requires an available outlet. The choice between the two depends on your specific needs, the layout of your space, and your DIY skill level.