Those girls look so sad...are you sure they're "stretching" like you stated above? Droopy and super thin leafs, discoloration/burnt tips..are you sure she isn't locked out due to nutrient/PH issues or possibly another issue coming from within the soil rather than the environment? The temps are a problem but it looks like theres a lot going on there.
I grew 3 other plants in here, and they had no issues like this one. All had same soil nutes and environment. As a matter of fact out of the 4, this was by far my prized possession the way it developed bigger and faster than the others. Im actually surprised with the twist of events flowering unfolded.
The PH level is maintained at a solid 5.5-6. Nutes were given on schedule like the others. I stopped buds n blooms mix when discoloration first started and watered for 2 weeks until I reintroduced some bloom. Ive just been trying to maintain them best I can in these conditions to let them do their thing at this point as advised earlier.
The dark leaves, burnt tips, unfulfilling look, hardly any trichs, seemed to be strain isolated. I chopped the other 3 early due to the heat stress I STARTED to notice. They were not bad at all yet, but I rookishly culled them to take preventative measures. I wanted to have something instead of nothing in case things went south.