I use the Red Sea led 90 and it works fine. It does cast sharp shadows so I will replace it at some point. It grows coral like mad. I run mine at 65% blue and 20% white. Supports significant growth of my SPS and a maxima clam at the top of my rock work which goes nearly 3/4 of the way to the surface along with all sorts of LPS including hammers, frog spawn and to a torch along with zoas, blastomussa and miromussa on the sand bed and lower rock work. I run saturated Kalk and AFR and dose NOPOX for the bacterial benefits. Without seeing your water parakeets hard to tell what might be going on. Also, make sure your parameters are stable and not swinging significantly. That can have an impact too. For reference my parameters are:
Alk: 9.1
Ca: 440
Mg: 1350
Phos: 0.08
Nitrate: 8.5
Salinity: 1.026
Hope things improve.