Is that light you are using dual spectrum or is it just one of the blue or red spectrums. I would suggest using a full spectrum of light throughout your grow. You might want to move the lights a little farther away from the plant. I am half way through with a cfl grow right now, and when mine were seedlings i had the light too close and had the same problem. Move the light a few inches up and you should be good. The burnt leaves probably wont heal but your new growth will be fine. Keep the pictures updated! What strain are they?