what light distance do you guys recommend for 125w...

Hi @flowerboy! I've been using a 200W CFL for a while and noticed this: most of the times, you put the lamp right above the canopy, even as close as 2 inches / 5 cm, BUT it's all about the airflow. Concretely 2 inches won't burn your buds if the plant's summits does receive a slight continuous fresh breeze. Otherwise, if the air is static, a 2 inches plant<-->lamp distance will burn the apical summits. In other words, every setup is different, due to different bulbs / different fans / different environment temps. The best thing is to try by yourself, during a two days period where you can watch your plants every hour or so (weekend?): start by putting the CFL at 10 inches / 25cm, check the heat with your hand and give the plant 3-4 hours to react. If she's showing curling-upward leaves or other heat-stress signs, increase the distance. If she's praying the light and don't seem to bother about the distance, decrease the distance a bit and give her another couple of hours to adapt & react. Doing this step by step, you should be able to determine the best plant<--->lamp distance for your setup/environment. Hope this will help, keep us up-to-date and happy growing 👊