Used Linux for years but now loading at the house to setup mock enterprise Lab

[torreydale]

It's light in terms of the resources required to have a pleasant experience.  It does have an Ubuntu LTS base, so I don't know for sure what you mean by that part.  You get the same Linux everyone else does, but with a very customizable lightweight desktop environment.  It also includes a tasteful amount of pre-installed software with the option to easily install more.  It's light in terms of the time required to get it running and keeping it maintained.