Reflective Surface

What is the best reflective surface? White panda film, flat white paint (any specifics), gloss white paint, black pain, reflective dimple foam insulation board, dull sheen aluminum reflective board... ? Does it matter or can it depend on Veg or Bloom stages?

Just looking for some finer details information.

Thanks.

It's between flat white. And panda film... or mylar if you wish.

anything but aluminum foil and mirrors is pretty good.

When I was building my room I needed some insulation as it's a cold cellar so I insulated the inside wall, then used 3/4" styrofoam sheets with this reflective layer on one side, flipped so the reflective surface was facing out. It's held up well and is almost a mirror reflection, whole room including the ceiling is covered with it.

They're $13 for a 4x8' sheet at Home Depot, probably $10/sheet in the US.
https://www.homedepot.ca/en/home/p.eps-rigid-insulation-96inch-x-48inch-x-34inch.1000116759.html

I like the panda, as long as you can put it up will minimal seams. Very easy to clean. I used a jug of wood glue, a large paint brush, and a staple gun. A second pair of hands also helps.

VIVOSUN ( Amazon ) got big fucking roll for $25 ... Lined 3 tents plus a corner wall grow and have tons left.

The best?
Orca film,
Or
BEHR Premium Plus - Ultra Pure White Flat # 1050
Both are reflective af.

3rd place, prolly panda film.