Now what about all these toxic bulbs and exotic electronics utilized in the indoor growing business? For one, the manufacturing process to make things like sodium-vapor , mercury and halide lamps. Rest assured dear reader very few humans beings have actually seen the factories (indeed, even know where to find them) that manufacture such devices. To be sure there is a very legitimate use for this type of lighting in many instances for a variety of industrial reasons, but to grow plants?? Plants that do very well thank you sitting out in the light of a sunny day. The increase sales and marketing need to produce even more lights and such increases the total pollution output of these type of factories. And then, there is the trash. What happens to all these toxic bulbs when they have reached the end of their lifespan? We are filling the landfills with, oh and by the by, how many lazy growers actually take old bulbs to the appropriate places, real nasty stuff on a very much larger scale than if indoor growing wasn't around. Let us not forget all this while our sun offers us a truly green and sustainable alternative.