Sun burn??

[Greenguyz]

Are these burn spots??
Lights about 18”

 

[threatco]

It does not look like light burn to me. Not pale enough.

 

[Greenguyz]

It does not look like light burn to me. Not pale enough.

It’s almost like I can see thru the spots. Sorta Transparent

 

[Greenguyz]

It does not look like light burn to me. Not pale enough.

Cal mag?

 

[threatco]

Cal mag?

could be. does it have spots like this on the underside of the affected leaves?