6 Pack High Silver Reflective Mylar Film, 83x 52 in, Garden Greenhouse Covering Foil Sheets for Plant Growth, Grow Room, First Aid, Camping, Outdoor Survival

Claims: "Two-sided reflective film, it can effectively reflect back 95% of light"If it reflected back 95% of the light you would not be able to see through the film as only 5% of the light could get through, but you can see through this film very easily. There is no way 95% of light gets reflected. I hung this film over window so neighbors would not get blasted with light from our grow room. It does almost no good for that purpose, so that verifies that 95% of the light does not get reflected and a large percentage goes right through the film.

helps keep cool air in the house when applied to windows. give windows tint image. helps with the light bill.

I got these reflective sheets to cover the walls inside my indoors greenhouse to add some extra light for my seedlings. Two sheets was more than enough to cover the small greenhouse (a walk-in 57" x 29" x 76", and they made a lot of difference. When I turned on the lights, I really needed sunglasses to protect my eyes. What a great way to improve the condition for your seedlings on a budget.

I hoped to block light on windows and it did very little. It was quite flimsy as well and hard to use.

Tried to pine the chicken coop with these but they ripped immediately. Repeatedly. I wanted to keep one for in the car for winter emergency but now I would rather not use these in any emergency because I trust I’d die. They’re crummy.