Par meter suggestions?

[FieldEffect]

I think both the Uni-T Bluetooth and the Photobio are great options.

I did some testing and a teardown of both here:

FieldEffect's Attempt to Grow Indoors

Watered again with same solutions. Runtz x Sour Bubble seedlings still getting the 0.4EC, 907 Blue Genes x Shiskaberry 3 and 907 Blue Genes x NL #1 already in 3" cubes getting 0.9EC. pH 5.51 which I actually trust now and didn’t verify with dropper solution or ph paper. I moved the weaker 907xShisk onto a small tray and placed it up on the ~200 PPFD shelf rather than the ~400 PPFD lower shelf. The lower seedlings for the most part are taking off now, but that one seemed stunted so trying to tak…