What is Reddit's opinion of Lepilion Highly Reflective Silver Mylar Film Roll 4 FT x 100 FT 2 Mil (1 Pack) Total 400 Square Feet for Garden Greenhouse Grow Room Tent Covering Foil Sheets Maximizes Light Energy & Heat Retention?

From 3.5 billion Reddit comments

Consumer grade silver coated Mylar sheets are at least 98% light reflective and also reflect infrared. They are light in weight with 4 ft x 100ft being about 6 pounds.
Support structures may weight more than the sheets.

Surely a producer could make custom sizes and increased reflectivity for little cost. Being able to advertise that their product is used on the moon would be added value.

Lepilion Highly Reflective Silver Mylar Film Roll 4 FT x 100 FT 2 Mil (1 Pack) Total 400 Square Feet

https://www.amazon.com/Lepilion-Reflective-Greenhouse-Maximizes-Retention/dp/B083775346/ref=pd_lpo_86_t_0/132-7007567-8113617?_encoding=UTF8&pd_rd_i=B083775346&pd_rd_r=0538c857-6a4c-418d-b03e-686033cddd78&pd_rd_w=WCzLT&pd_rd_wg=j923u&pf_rd_p=7b36d496-f366-4631-94d3-61b87b52511b&pf_rd_r=F2Q1R2SXXNJHAA9D2DMS&psc=1&refRID=F2Q1R2SXXNJHAA9D2DMS