.........no, it won't.Will a seed grow and survive for three weeks if left unattended?
How bad can it get with nute deficiency?I would like with a drip system yes. But your biggest issue will be you will either leave the lights to close and burn her to death or you will keep the lights too far away and stretch the shit out of her. If you have a drip system you could rig up 3 sets of lights on timers and each week kick out the lower lights so that in week 2 when it's grown close to the first set they are off and the second are kicked in. It'll take some work/ fudging but you could do it, you will then just have to worry about nute deficiency.