Suspected light burn. First grow.

Hello,

So I'm on the first week of flower after about 9 weeks in veg. I suspect this is light burn based on the well-defined line of damage in the first and last images. I also lowered the light slightly just after flipping the light cycle. Absolutely no problems preceding this, the plant is (seemingly) healthy otherwise. I'm just posting this here to make sure it's nothing else.

PICS HERE

* TS600 light
* Tatanka Pure CBD
* Soil/perlite
* GH Trio nutrients - (currently 2ml Micro, 1ml Gro, 2ml Bloom)
* Watering approximately every three days, or when the pot feels light @ 6.5-7ph. Intermittent plain pH'd watering.
* 15L Air pot

Thanks

I just remembered when I was watering yesterday. I watered some of the leaves by accident, maybe the nutrient water sat on the leaves overnight and damaged them?