Shiny parabolic or mirror use

[FOQ1]

So depending on the materials one may be able to save weight and costs to build a simple light reflecting unit.

Mylar could be a good choice. I think if I was tasked with designing such a thing, I'd want also a clear material that could used to form a mylar balloon. The balloon could be inflated to create a parabola with little effort of trussing with a focal point outside the clear material.

[SpaceNut]

So depending on the materials one may be able to save weight and costs to build a simple light reflecting unit.