Hi there!
She looks perfectly healthy so no worries!
Are you using the led at full power?
If there is a dimmer she needs only maybe 30% of that at that stage.
Happy growing!
The distance is fine and you won't have any problems with burns. In any case, you have a lamp that is dimmable, bring it to the minimum power for this planting phase and then to 50% for the vegetative phase. Good growth. 💪😁
I can guarantee you that your seedling is not suffering from light burn or any other burn for that matter. It looks perfectly healthy. Hopefully, I answered your question and remember " Happy Growing and Free your mind one puff at a time ".