I have about a week old seedling that I had about 2 ft away from my sf 1000 100w led and it stretch, I moved it closer to light yesterday at 50% and stem bend a little and I see no growth AT ALL. I've been playing w the light sm idk what it want the Temps never drop below 20c and 50 rh in ff soil
Right now most of the growth is happening underground. If you just moved it closer give it a couple days to see how it goes. You will end up at around 10" at full power soon(couple weeks)