The two sides of the red plant problem are:
Does the light emit enough light in the red part of the spectrum for you to see reflected red light?
Does the plant need red light in order to turn red?
I don't know the answer to either question for sure, but I don't think plants need red light to turn red, just enough PAR. And the first question would have an answer dependent on what LED light you are referring to.
thanks for this question . I have the 48" ray2 and had my red plants fade when I put them in from the LFS. However, they weren't the ones that were listed above as the ones that would stay red. I am going to try and get those ordered and give them a try!!
55 gal plant newb
48" finnex ray2 slim led