It's not light burn. It's a nutrient deficiency. super soil will only provide nutrients for the first 3 - 4 weeks then you need to start adding nutrients if you want healthy fat buds. If you haven't checked the PH of the water then that is an issue as well.
Skipping steps and hoping for a good yield is what many first time grows do. Chucking seeds in soil, watering them and keeping a light on them will certainly make the plant grow but unless you like smoking fan leaves, the buds will be small (if any) and will not be very potent.