Durban Poison

Mistake or bad engineering? The light on the light telling me the hours I assumed would not effect the light cycle. Two weeks ago I flipped. A few days ago I peeked inside when lights were off. The plants were well illuminated by the ( on ) light. I put black tape over the light. I also knew the temperature got down to around 50 to 60 degrees when the light was off. That's a bit low. I found a 200 watt ceramic heater. I run it for half an hour four times at dark cycle. Brings the temperature up to 70 degree s at night 👍👍 Instantly the Durban grew an amazing crown. It has large triangular points . Never seen it like that before. It's part of the genetics . I have added two top dressings so far . The plant is still easy to keep compact but she will stretch late in flowering. I will top dress soon .