Don't get me wrong, I think LED's are obviously a great thing in terms of lighting and compare well with all other lights in vegging, but flowering still seems questionable. I am by no means bashing, just trying to understand a little more since I am new to LED's.

LED's are cost efficient, are better per watt than HPS, less heat, lots of long term benefits to growing. But what is the time frame and the yield compared to HPS? Why does LED not penetrate as good as HPS? How come most hydroponic shops don't offer LED setups for lighting, they mainly focus on their HPS systems and boast how good they are over everything on the market, not to sound like a dick but I would believe them over anyone on forums, they are running a business and they are in it to make money. So why not push the most cost efficient product, unless there was also downsides to it?