Powdery mildew or light burn?

Noticed these white spots on some of the leaves on my plants, was wondering if anyone knows what it is?

Done some research and think it could be powdery mildew but not so sure as humidity is ok and there is good air flow in the room. The only other thing I think it can be is I sprayed some optic foliar switch spray onto the leaves with the lights on and don’t know if this has burnt some of the them (even though on the bottle it says it’s fine to do that). Or maybes it’s nothing to worry about?

sorry pics aren’t the best, any help much appreciated.

Possible bugs …. Check thoroughly.

Another question …. Why SWITCH ?
Are you running a known male or strain with high potential of hermaphroditism?

If that plant is a FEM , then application is a waste.

I thought that also, I’ve just sprayed with biobizz leaf coat in case of bugs. And just used switch for peace of mind had a few plants on my last grow that Hermed so thought it couldn’t do any harm.

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Doesn't look like powdery mildew.

In some pics it looks like Mg def.

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Click the image to enlarge.





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