I had a post up here about the costs of growing with artificial lighting, but I've been recently giving this more thought, and I think that we can grow a significant quantity of leafy greens at a cost that is significantly less than you can buy their equivalent quality in a store. I think you could potentially save over $500/year just growing all of your own lettuce, and I have a preliminary design that should pay itself back in just 1-2 years. As I go through a process of prototyping and testing, I would like to come back to this post in a few months after I have some real results and a new product design. I'll share some of what is happening on our social media channels along the way if you are interested in seeing what is going on. In the mean time, Amphora is a great way to get started with indoor growing on a windowsill and produces some really high quality herbs.