Ema26answered grow question 5 years ago Yo what’s up! I wouldn’t be worried about the casing getting stuck I’ve had multiple where I’ve had to remove the shell myself. As for the light I see you’re using a 125w cfl and i would personally get it as close as 10cm. I just got through a seedling with 250w cfl being 10cm away. Any further and they’ll be stretching for the light. Hope this helps, good luck!🌱