Blacknifes 50g Battle of SPS learning

[blacknife]

Everything is still growing and doing ok.
sps are growing and.. showing hints of colour but not not really colouring up.

im not sure if it has only been since i got my new lights or if it has been longer, but all my zoo's and some of my lps have been looking fairly washed out lately. looked through some of my old pictures last night and was affirmed of that. I know need to put new lights in my newer fixture but i don't think that would cause this. New lights are waiting till I'm working again.

what do i need to do to get some color back in my zoo's?