Tangerine dream

Sometimes new growth can start a little pale, especially when it's growing fast. Does the new growth darken up as it gets bigger? Think you're fine. Plant looks good.

I think what you are seeing here is just a fresh new leaf. They will always come out slightly down colored then green up over time. Dr. Bruce Bugbee went over this in one of his videos and the the reason behind this is simply because they have not been able to produce enough chlorophyll yet to turn green. This is especially true if your go into your grow room right as lights come on and all the new growth is yellow because they have had no sunlight yet. I would keep doing what you are doing because the plant looks healthy. The level of light you are giving it now is perfect till you are ready to send it into flower. I hope this helps.