I have to agree with the others on electric usage. The power company is not going to mess with you as long as you pay your bill on time, and power consumption is not double or triple "normal" usage overnight. If you want to increase your amount of lights, think ramping up gradually.
Sorry if this is off topic, but about 6 weeks ago I started my second grow and used smithgrow's soil formula, (50% potting soil, 40% peat moss, 10% perolite). I like the "soft" soil, (as opposed to just top soil- which was very dense). I have not added any fertilizer so far, and I have 3 plants that are doing very well, (IMHO, lol).