I have a Fluval Chi 5 gal aquarium with an 1"x1" array of LED lights in the water at the center if the tank
I wasn't impressed by their brightness but my plants seem to be
My Apoggeton crisps, which is planted right beneath the lights has already reached the surface ind is spreading out over it and is growing faster than others of the same specie in my BioCUBE 14 which is a brighter tank
My Banana Plant initially looked like it was going to die but has put up four submerged leaves that are much nicer to look at than the surface leaves a similar plant in the BioCUBE is putting up
And my moss ball is a bright green
I am surprised by how well my plants are growing in what looks to me to be low light