first grow GSC(closet)

having a hard time wondering if they are ready to harvest, first grow here, they aren't automatic, I had them in veg for like 3 months since I didn't have a good enough light source in the beginning. but since about month 3 , I started upgrading the ights until I concluded with 2 300 watt cheap amazon leds. first one and then about 3 weeks later another. I realized that I could still use more so I bought a 1000 watt amazon led with uv and ir. I put the bigger light in the middle and the other 2 side by side of the big one. so I would for sure think that a combined light source of 1600 watts even if it is amazon powered should be enough to have this plant produce as nasty buds as it can, even though I now realized how much I would have benefitted if I would have had them during vegetation as well. I am going to wait another 2 wekeks and see if I can get them to grow more