Plant doesn't look so good, any help about what it may be and how to fix it plz!!!

Hi!
I have a blue star in a solo cup, it was in an indoor setting and was transferred to outdoors a week ago, It gor two new leafs when it first came in contact with the sun, but now a bottom leaf is burning and curling up and there is spots on it, not to mention the brand new leafs are turning brown from the middle out *sigh*
Help please!!!

some type of nutrient deficiency + its probably way too hot for such tiny plants that used to be indoors. Direct sunlight is 50,000-140,000 lums, 400watt HPS bulb is about 50,000, and a 250watt soft white lightbuld (ceiling light) is only 5,000 lums... Thats all I say without information on the soil, previous lighting, height of plant, is it flowering (only reason to put it in 12/12 hour day/night).

the containers are too small. transplant to 3 gallon containers and soak them, leave them alone for 3 days and you should be fine. the worst thing to do is to try and play with nutes when you dont know the problem.

Ive done some research, if you take your plants say from 75 degrees to 89 degrees, that burning of the leaves can happen.

It looks like intervienal choloris of those leaves... What I think is happening is a combonation of heat stress/ low light/ high salt buiildup. There is also the potential of a magnesium deficiency but with the plant that young that is doubtful. I would move it indoors to a controlled environment and transfer it to a bigger pot. What type of soil are u using? Oh BTW I know it sounds crazy to suggest low light when its outdoors but with the way some strains are bred nowadays the sun is only providing enough light maybe 4-6 hours outta the day kwim? Plants get used to indoor lighting at a constant intensity for the entire day.... But like i said I would suggest moving them to a bigger container, running distilled water ph adjusted to 6.5 with epsom salts (cal-mag) and moving them indoors until it stabalizes with a day temp of 76-79F and a night temp of 68-74F.. give it 2 weeks itll bounce back.

Cal/mag def dude. Get cal/mag from some place or use 1tsp Epsom salts/1gallon water and feed every week