Question about mylar reflective film...

Using a 2x2x4ft tall closet setup with tin foil on the walls (in the picture) with 150w. HPS. My question is: Would Mylar reflective film make a noticeable difference in brightness or would it be a waste of money in such a small area?? Thanx for any help.

better and less smell bro if u worryed about the smell

smell don't bother me. I just wanted to know if it would be worth it to use mylar?

Go Panda Poly Film, the white is a little more reflective. If you don't care though definitely go for the mylar, aluminum foil isn't the best and can cause burns sometimes.

Edit: Another option would be Flat white paint, and paint the walls with it. Buying mylar would be worth it, but buying the panda or paint would be worth your money more so.