How long did you veg them? How much do you have invested in lights? I kept my LED much closer to the canopy to keep them from stretching but thats a personal choice.
Day 55 veg under LED 24 hrs.

I had to pulll the BG from trying to flower with the LED as it just fell way to far behind. 3 weeks under 12/12 LED it grew 4-5 inches. When I put it under the HPS it jumped up a foot in less then a week. It's to bad you don't have an HPS to do a test and flower a few under it and compare.