Well you can listen to everyone else who is paying for it, or you could step "outside" of the HID point of view and take a look at Super High Output LEDs, I was going for 2x 250w HID for my grow until I found the New LED grow lights, Im going to order a 126w Penetrator Pro, and order another when I have enough cash. The bigger and better the model the more efficient and intense it will be than HID, but not the same coverage area, running at half the watts and temps(105F)
They do cost a lot, but make up for it in energy saved, heating costs, and whatever other problems come with HIDs
Before anyone talks shit take a look and do some research on the New High Output LEDs, a few companys have them but only one has been proven better than HIDs as far as efficiency, 1 gram per watt is more than easy with these bad boys.
Ill be starting a Big thread on these when I get mine, but go on youtube and look at some of the grows done with these LEDs.