A little help please

So Im a first timer at this and would really appreciate any help. So I have a problem I started off with CFL lighting then just recently went out and bought me a big boy light 600 watt HPS and now I noticed my babies are starting to get some weird yellow on them. I have been researching on what it can be and have not had any look. So Im reaching out to the moment community for help any ideas guys on what this can be here is picture. Think it could be light burn maybe light to close to them or nut burn

how far away from light, it doesnt look like the lights the issue. what line of nutes are you using and ppm?, what is ph?

I had that same issue once. Only thing I could think was when watering/feeding, I got some of the solution on the foliage. End product was not affected. But could be something else. just my 2 cents

nl5xsk1 said:

how far away from light, it doesnt look like the lights the issue. what line of nutes are you using and ppm?, what is ph?

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Well since I got the new HPS 600 watt I had them about 12inchs away, I was thinking it could be light burn so I picked up my hood about 18 inches now. As far as soil its the Fox Farm blue bag Nut are FloraNova 4-8-7 its day 2 of flowering 1/2 teaspoon for 1 gal of water I was told