ARAY 4 PRO test and review by LED Gardener by Shane Torpey | Jun 20, 2021 | Grow light reviews | 0 comments LED Gardener has tested and reviewed the MIGRO ARAY 4 PRO. He has measured the PAR output from the ARAY 4 PRO at multiple hanging heights with some amazing results. Check out his full review below. Explore the Migro range Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. This site uses Akismet to reduce spam. Learn how your comment data is processed.