I use this for my mini tunnel
https://www.amazon.com/Agfabric-12x2...50+shade+cloth . Lowers temps 15 degrees. I plant my peppers so they only get 8 hours of sun. Mostly in shade after 3pm. Another thing that works well for sun scald issues is this
https://www.groworganic.com/surround-25-lb.html With the added benefit of repelling several pest.