Well what soil are you using? Perhaps your plant is in too big of a pot for it's age. Remember, it doesn't have a lot of roots now, so, if you are watering a big container of soil, a lot isn't being absorbed by the plant, which could be the cause of the fungus gnats. Make sure you have the correct spectrum CFL for your stage of growth. Vegetative growth needs the cool cfls, while flowering needs the warm ones. Good luck and keep us updated.
Peace,
horror business :rasta: