Slow coral growth, need new light?

[reefinnewb]

I built a DIY LED light about 3 years ago. I used three of the lumia 5.2 over a 36" tank. My parameters are good.

calcium 450
alk 9dkh
magnesium 1450
pH 8.3
ammonia - 0
Nitrite - 0
Nitrate- 5ish, I'm colorblind so it gets hard when there isn't much

Everything looks great but just doesn't seem to grow much at all. Wondering if I have enough light or enough of the right spectrum. Thinking about going back to t5 or looking at a different LED fixture. What are your thoughts?

Brent

Edit: forgot to mention, my bubble tip is on the glass near the top of the waterline. He looks great but I feel like he's looking for more light. The light other than the whites, are all the way up.

 

[Gtinnel]

Depending on how your lights are mounted could you just add more lights to what you already have?

 

[reefinnewb]

I was thinking that too. They are in a Makers heatsink slim so I might be able to attach lights on the outside.