Because if you live in an residential area a green house looks out of place. The solar panels will offset some of the cost of electricity. Indoor isn't going to go anywhere. Look at all the fat warehouse grows in Colorado. In my opinion you get a cleaner product with IndoorHuh? Yeah rite...invest in expensive solar panels to grow weed inddors under energy hogging grow lamps...yeah rite. Why not just skip all the madness (which made sense in the dark days when it all moved indoors to not get caught) and grow in a highly efficient greenhouse with all the fixins? The whole reason and indoor growing paradigm is changing and slowly fading away in direct proportion to the state of acceptance amd legalization.