Sorry thunder for getting off thread a little bit.
I love the calculations but you didn't factor in other things. For example it's easier and cheaper to vent a couple LEDs then it is for 1 400W or more HPS/MH. Factor in that you wont need those fans to push a lot of air, no noise polution, no light burns on you or your plants. Obviously all these are much more crucial in a cabinet or closet design sense space is so limited. Over all I think the LEDs even in this stage are more then worth it. Not to mention if you really wanted to you could always sell a little bud and make all that money back. You can always make money back or something to pay for anything, but when it comes to energy which is in constant need to grow, that's a little bit different I think. Plus I don't like a grow showing up in the electricity bill or fire hazards or even pigs flying by doing illegal infraread shots.
I love the calculations but you didn't factor in other things. For example it's easier and cheaper to vent a couple LEDs then it is for 1 400W or more HPS/MH. Factor in that you wont need those fans to push a lot of air, no noise polution, no light burns on you or your plants. Obviously all these are much more crucial in a cabinet or closet design sense space is so limited. Over all I think the LEDs even in this stage are more then worth it. Not to mention if you really wanted to you could always sell a little bud and make all that money back. You can always make money back or something to pay for anything, but when it comes to energy which is in constant need to grow, that's a little bit different I think. Plus I don't like a grow showing up in the electricity bill or fire hazards or even pigs flying by doing illegal infraread shots.