PenguHBanswered grow question 3 years ago Most likely light burns in my opinion. Watch the light intensity and the exposure. If growing in a room, control the distance to your bulb, if outside, reduce the time in full sun. Make sure the temperature is within 20-30C and that there is a bit of air flow in your room.
If it is compost+perlite you use, do not give ANY nutrients for at least 2 weeks or it will burn your plants. Good luck!