Gorilla Glue Auto-flower

Starting week 7 2nd week of flowering, the beast in the back of my tent is pretty much all stretched out, as is the front left one, the other is lagging a bit behind and the one in my closet is just now showing signs of stretch. I have increased the light to 90% which is about 400watts. Re-arranged the fans inside the tent to get airflow above the light as well as under the canopy. The stretch continues through mid week 7. Lowered the light back down to 75%. The highest spots were hitting around 1000ppf, may increase later in flower to push them hard. There is purple streaking down the stems of the largest plant.