Average stem height of the big ones are 36 inches, but the mishap past week with the lights might have stressed em a bit and caused some stretching. There was also a humidity issue for a few hours, which could be the culprit for the stretching. Two stems are pushing 40 inches. However, there are no signs of light or heat stress, despite the stems getting within inches of the leds. We shall see...
I’m also battling a cold Canadian winter where it hit -42 Celsius today. Plants are in a cold basement in an old house. Had to bring out an extra space heater. Can’t get the temp in my tent above 20. Tent is too packed to introduce a stand up heater. Maybe I’ll convince the plants that fall is coming and they need to bud like crazy.