Light burn or deficiency?

This is a bubblegum auto that’s 5 weeks from seed. This morning I noticed a few leaves had this discoloration that wasn’t there last night. I raised the LED light just in case but if it’s not light burn please let me know. Thanks!
 

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BigSledge what's you Ph?

You may have had a deficiency when the lower leaves were new, that's not affecting the upper leaves now.

Definite problem but it might not spread.

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BigSledge what's you Ph?

You may have had a deficiency when the lower leaves were new, that's not affecting the upper leaves now.

Definite problem but it might not spread.

.
Ph is between 6.5-7.0, the tent temp is around 77F, the issue seems to have been resolved now, not sure what the deal was a week or two ago
 
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