NEUTS are neutrients,(elements that a plant need to be healthy) most soil contains a starter of neuts that lasts the plants the first 3-4 weeks of its life, having tips go brown is to me uncommon in the first week, i dont think it would be ur light if its cfl, u can basically touch the plant with the bulb and it wont burn.
maybe ur soil has high concentrated neutrient mix in it and the plant cant handle it as its so young, i realy dont know wot to advise u other than to check wot soil ur using and be sure not to overwater, at that age u should be watering very sparingly and waiting for the spoils top inch to dry b4 watering again, u could even try cutting down ur watering frequency and foliar feed, that way u wont be giving the plant to much neuts!! hope this is of some help.