Hindu Kush Auto GC Seeds

Big growth spurt. Feels like it shot up nearly 9" in 1 week. My aggressive approach to fertilization seems to be paying off. Although I told myself I would not top it, but I did it about 10 days ago. That seems to be paying off as well, I'm seeing 4 to 6 main colas in the making. Some of these fan leaves are as big as I've seen on any plant, I'm amazed. Believe it or not I grow this out of pure hobby and give the rest away to a few friends and a cancer patient. I'm going for the pain killing effect so when it buds I'm letting 90% of those trichomes go amber. Going to keep an eighth for myself. I see the very beginnings of flowering with the pistils, so I'm going to back off the strength of grow big from 4 tsp to 2. I also learned my lesson in the past moving onto the flowering fertilizer too fast. Practice makes perfect. If any grow veterans, based on these pics have any pointers, let me know. I'm getting closer than I want to my lights being 18" away now. No signs of stress. You can see the specs on my light it say 600 watt, but only draws 40 Watt on Veg mode, 80 Watts on full spectrum. I'm worried when I turn it on full spectrum mode. I think when they say 600 W, that is just a selling point by saying this is "like" a 600 W light. Wondering if I need to LST a couple of those developing colas up top to reduce a few inches while these stems are still pliable. This is a Hindu Kush auto, but it is growing like a beast. Thanks for any advice.