Hey all, decided I need more room so building a groom instead of using the tent and basically I'm not sure on what will be best for the walls

white? Mylar? Reflective foil? Or I've seen some small sheets (imagine with a quick look can find bigger) of the "high Viz" reflective stripe stuff, now, would this actually be any good? Does it actually reflect useable light?

It's not happening overnight but hoping to have it complete and operational by Christmas (taking my time and not rushing into it)

Cheers all
