mini greenhouse material? plastic or cloth or both?

I have a few 4x8 raised beds that I am planning to cover this fall/winter. last year I did some tests and covered with basic clear plastic. That was good, this year I would like to take it up a level.

I am considering the AG-19 row cover. I see it has good reviews.

I am also considering a clear plastic made for row covers.

Then I am considering using them both.


ANy thoughts on that or getting the best protection for my buck?


Last year I did find that using the large xmas bulbs, I was able to maintain +7 degrees to ambient temp. I am thinking that will work, but better with the AG-19


THanks,