New grower, leaves have spots

From a fellow grower:

I am A knew grower I am now in to my third week from germination and a few of my leaves have Little spots on them I will send you a picture withthis email just wondered what I can do I don’t think it Spidmite or anything like that

I am using a 250 W HPS high pressure sodium with an intake fan and
the temperature is 27.5 Celsius I don’t know what
the humility is dressing up close

Have you been feeding them any nutrients ? Please be honest ok…because its to only way for us to help you.
Also do you have a way or meter to check your ph ? Because it looks like nutrient burn.

One more thing…Please fill out this Support Ticket the best you can…ok

This will better help us help you…
COPY/PASTE: This “Support Ticket” into your forum post.
Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so = NA

Strain; Type, Bag seed, or NA

Soil in pots, Hydroponic, or Coco?

System type?

PH of runoff or solution in reservoir?
What is strength of nutrient mix? EC, or TDS

Indoor or Outdoor

Light system, size?

Temps; Day, Night

Humidity; Day, Night

Ventilation system; Yes, No, Size

AC, Humidifier, De-humidifier,

Co2; Yes, No

Add anything else you feel would help us give you a most informed answer. Feel free to elaborate, but short, to the point questions and facts will help us help you

Thank You