You can use your own extension cords and a 3 way splitter to put temporary lights where they are needed. You don't need to run lights together in one string. It's easy to branch off cords to go to different rooms. And you're not tied down to having the lights exactly 10' apart as with preassembled light strings.

In stick frame construction, the fixture can hang off a nail pounded into a 2x4 / 2x6 wall. After the dry wall gets on the ceiling, you can move the light to the ceiling when dry walling the walls.

In steel frame construction, mounting is easy using the 85 pound pull magnet or you can use the eight 5.5 inch hook & loop straps to tie it wherever.