Windmills are prone to failure in my experience (residential) and require lots of service. They may have improved them recently though.If you have the land. There are many wind generators on the market. Havent heard of anyone using them to grow.
http://m.homedepot.com/p/Coleman-400-Watt-Wind-Turbine-with-30-ft-Tower-Kit-48640/205568472?cm_mmc=Shopping|G|Base|PLA|D27E|Electrical&gclid=CNCN4cjwvMICFQsKaQodhowA6w&gclsrc=aw.ds
I use solar to offset my energy costs with my HID lighting. I have 32 200 watt solar panels. I figure on average I save enough energy to run 2 1000 watt lights and my house. I run many more than that but it does help keep the costs down. I looked at wind and fuel sells also but solar seemed the best bet with no moving parts. I'm slowly switching to LED lighting which doesn't seem to have the same results as HID. During peak hours between 11 am and 5 pm my solar pumps out between 5000 and 7000 watts per hr. If you multiply that by 6 hrs that's 30000 watts per day just at the peak hr period, the hrs before and after peak also generate power but not as much as the afternoon. Even on overcast days my solar will generate 10000 watts total where on an exceptionally sunny days it puts out 50000 watts. I would have to agree that it is very expensive to install a system a few years back when I installed the panels between the state rebates and the federal tax credits I ended up putting out roughly $10,000. So in reality the state and the feds are helping keep my costs of growing MMJ down to an affordable rates. lol thanks big brother your the man!!!has any one used solar panels to run their HID lights? Ive used them to run fans and timers ect. but not lights.