Super light green new growth but plants are healthy

First time with coco perlite mix
Using cal mag and mag boost last week
Ph is 6.2 and temps are 86 day and 69 night with 52% humidity

looking for opinions!?

New growth is light green at lights on from growth at night. They will darken up to match the rest of the plant. If they don't then you might have a nutrient issue.