drop that light lower get that thing right above your baby, floro dont burn a plant like an hps/mh does, i usually keep my 100w watts withing 2 or 3 inches of the plant. make sure you got oxygen going to the resevoir, keep the bubbles coming. i would some nutes at a very low dose, my nutes recommend a 1/4 tsp per gallon for a seedling i use 1/8tsp (just to give you an idea). good luck,
seasoned