I don't agree with N toxicity as some have stated. At least yet. Yes I see your fat indie leaves are curling down, but N tox has a more pronounced downturn at the very tip. The leaves from here look thirsty. Or your vpd is out of wack for your environment heres a classic shot of N tox leaves and your leaves will be a dark green almost blueish looking.
See how dark these leaves are. Since you don't have any way right now of knowing if your on your way to N tox or if simply the plant was thirsty or just waking up shortly after lights on, pay attention to how it reacts after you watered it. You might want to back off on your N inputs as well go back by 50% or more for a bit.
Also BB strains aren't real nute whores and with good soil will produce rather well. Keep your Ph in soil from 6.2 -6.6 I like to let my Ph drift so to better cover the various levels of nute uptake at different Ph levels. Gets more balanced nutrition to the root zone and plant.
At the temps your running as other said it would be nice if you could get the temps lower. But you can still grow good erb with higher than optimal temps. Pants thrive in higher temps with C02 enrichment..
How close are your HIDS to the canopy? Even tho your ambient temps in the surrounding air are where they are at, you have to account for distance to the canopy as there is also IR coming from your bulbs and they can cause heat stress if your lights are too close. The BB looks to be either thirsty, too hot, or your vpd parameters are off for you enviroment