The phrase "illuminating work" means a piece of work or literature that enlightens or educates people about something in a clear and easy-to-understand way. Full definition
There's also a large LED light that you can use to illuminate your work area in the dark and comes in really handy to help you make sure that people see you. (geekwrapped.com)
Choose a table lamp or task lamp to illuminate your work area, and a stunning floor lamp to brighten up the room. (worldmarket.com)
In Fantastic Reality, Mignon Nixon not only illuminates the work of this revolutionary artist but rewrites the history of sculpture in the post-war years. (mitpress.mit.edu)