OK Ned.. It looks like you are using a CFL or some sort of fluorescent light. If using flouro's then you could essentially put the light directly on the plant and not have to worry about burn from the light. Id say no less than 2" from the plant canopy. If you are using anything other than an HID, LED, or flouro you will not have enough lighting and cause heat problems.

Nutes aren't needed for at least the first 3 weeks after sprout has popped up. Nutrients this early will cause nute burn and stunted growth. After the 3 weeks period you can start adding nutes, I like to be safe and start at 1/4 strength and go up from there if the plant can take it.

Other than that they look really good..!