what they said.. (mostley)...get those lights as close as you can. 1-2in. ...test it with the back of your hand...if it's too warm for you it's too warm for the little ones... and ya no nutes till they need it... also if your growing in dirt/ like medium...your pots should dry out almost completely before being re-watered.

had similar problems myself at first... it's all trial and error and learning from the errors...good luck.