BTA's getting short and stringy? More or less light?

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splix

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I moved about a dozen of my BTA's over to a new tank. They were always under LED's but these are different LED's. Now they're under AI Hydra 26HD's. Pretty much all of them went from full and long thick tentacles to short super thin and stringy. The bases are always full and open, but they just look weak.
I've been messing around with the lights and I know, just leave them alone. I'm just wondering if this means they need more light or less? I've got my Hydra 26's on my RSM 260 running at 55% all channels besides red/green at 0.

I just now tried feeding them to see if that helps. Just curious if I need to ramp up the lights a little more to maybe 65% or lower them.

This is flow off right after I fed. The others arent normally curled up, they're just munching. :) But this one gives you an idea of how thin and small the tentacles have gotten. I've noticed they're also a lot darker of a color.
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what's the spectrum and intensity of the lights they came from?
 
They came from those black box china LED's, running about the same percentage.
 

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