Light color, Burnt tips?

I am growing 3 amnesia #7 Autos from seedsman in my 2x4 tent. Using Flora flex nutes (only V1/V2) at the moment. I planted the seeds directly in the middle on Dec 20th, they have seen very little water so far, I fed them for the first time yesterday as recommended by Flora flex schedule, on all 3 plants the first set of leaves had this white, maybe burnt tips ever since they sprouted basically. They also seem light green not really sure, I’ve also been using CalMag any time they have seen water. Have been PH to 5.8-5.9 (spider farmer 2000) for the light it’s currently 27” from the tips, RH and temps have been alright for the most part got some reading yesterday temps around 86-88 which is under control now. Looking for some feed back, this is my second grow so I’m sure I’m just over thinking everything. Thanks!!!

The white/burnt tips have been showing before the plants seen any nutes at all.

Maybe raise your light. Nute burns just the tips BUT light burns the tips and edges. Hold of on calmag .