Nutrient or light burn? Thanks for the help

Hey, first time grower here.
Growing on a 4 (5gal) bucket DWC system.

Specs:
1x1x2m (3.2x3.2x6.5ft) grow tent
540W 6 piece COB led grow light, 300W true consumption
Led distance From plants 90cm (35in)
Reverse Osmosis water
Water temperature 19C (66F) / 20C (68F)
Temperature 20C (68F) / 23C (73F)
Humidity 65-70%

As far as nutrients I’m using Advanced Nutrients.

So, fed my seedlings for the first time at the 2 week mark (not counting germination/propagation) about 3 days ago, used a very very light diluted solution of nutrients at 230 ppm, pH’d at 5.7. Started seeing some spots on the first set of true leafs of two of the plants and some white “stripes” on the others, not sure if it is nutrient or light burn? Any advice?
Thanks.

Normal daylight/white light needed to diagnose. Can't tell anything under a blurple.

Need to see its real color, shes not happy though. Sounds like you have the feed very calculated and the growing conditions perfect, light is plenty far away.

Jt racing said:

Normal daylight/white light needed to diagnose. Can't tell anything under a blurple.

Click to expand...

My bad, here's some pics where you can hopefully see them better.
Out of the 4 plants 2 have the white patch and two have brown spots on the first true leaves. Also they're not stretching upwards much, could that be the light being a bit close? I moved the light a bit further from the plants to get them to stretch a bit more.

DarioZM said:

My bad, here's some pics where you can hopefully see them better.
Out of the 4 plants 2 have the white patch and two have brown spots on the first true leaves. Also they're not stretching upwards much, could that be the light being a bit close? I moved the light a bit further from the plants to get them to stretch a bit more.

Click to expand...

Still purple, but better.

TurboTokes said:

Need to see its real color, shes not happy though. Sounds like you have the feed very calculated and the growing conditions perfect, light is plenty far away.

Click to expand...

Hey thanks, yeah, I tried having everything under control being the first time I do it, but I'm still making some mistakes, I think the light might have been a bit close since the plants weren't stretching much, moved the light a bit further to have them stretch a bit more. As far as the spots and white patches, I'm thinking they might have been light related.

Thanks for the help.

More likely nute burn

I wouldn't worry about it too much. Are you using clones? From seed you'll get a variety of phenos who act weird sometimes in that seedling stage but more often than not grow out of it. Even clones won't guarantee you the same exact genetics, as things can change with a single branch as it grows. By the looks of the minor issue, I think it'll just grow out of it. Keep the nutes the same as you're doing until she gets to the real veg stage and the demand for nutes grows, then up and up. You probably already know that sometimes less is more

It seems you've done your homework and I can't fault a thing about your setup or grow parameters, so you should be good IMO. Look for buying great genetics if you can though even if you have to pay more.

Edit: I'd also suggest new lights

You haven't been getting water on the leaves have you?

Jt racing said:

You haven't been getting water on the leaves have you?

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No, I did once but I didn't think it to be necessary so never did it again, I have a humidifier on the tent though.