Soil shouldn't be too strong, I changed to Biobizz light mix for my seedlings, which stopped any nute burn.
Never had a seedling under 250 HPS, but your distance and temps seem OK (anyone who has used 250 for seedling please put your 2 pence in)
Humidity is a little low for veg stage, maybe the cause of a little discomfort to the lady. Around 60 is better. Maybe a container of warm water placed in the grow room, which will evaporate and help a little. NOTE: ONLY PUT A CONTAINER OF WATER IN YOUR
POWERED GROW ROOM IF YOU ARE CONFIDENT YOU CAN DO IT SAFELY AND NOT CAUSE A HOUSE FIRE. Sorry had to get my little health and safety disclaimer in there, my advice is advice only, and don't want any come backs.
I do notice that the crinkle leaves are almost mirror opposites, Maybe just genetics.
Hope this helps. If I'm wrong, feel free to correct me anyone