Hey everyone, this is my very first post and I need a little help getting started growing. I have done a ton of research and have learned a lot of information. The only thing I am not absolutely sure about is how many lights I need for my plants. I bought a 15 pot hydroponic system and was planning on using two 600 watt grow lights. One would be HPS and one would be MH. I have been told by a lot of people that I should just get two 1000 watt lights but I want to try to keep my electricity costs as minimal as possible. If anyone could make a recommendation on what I should use I would greatly appreciate it. Thanks.