Northern Lights Autoflower

A lot of new growth this past week. I lowered my lights again because I think they were still too high last week. I also moved my plants around a bit because I think the passive cold air coming in through my vent makes the temperature slightly different towards that side of the tent. The plants closer to the heater appeared in better condition so I rotated them around and will likely continue this until I can get a heater for outside the tent. I have also noticed some weird variegated-like patterns forming on the leaves (pictured above). They are almost white. I was curious if anyone believes this could be a deficiency or stunting. I wanted to wait a week for new growth before I made any calls but if anyone has input that would be appreciated.