Your curbside arguments was a waste of my time and to ANYONE who is coming into this thread for some useful information, 12 pages caked in nitpicking... frankly, this is an "indoor lighting" section, and you are fortunate that there is a separate area for "other lighting"
Growing styles is a pref., hyroot could have been speaking to HPS in veg simply to avoid any possible stunting switching spectrums so quickly to go to 12/12 (the sun does not just, boom, change in one day...) whether it be 12 hours or 2 days, its like putting on a new pair of glasses.. these ARE living things. Now, even to compare MH and the RIGHT LED (spectrum), LEDs still have tighter nodes and if you had any clue- you would know that.
you've said quite a bit of shit on here.. but I fucked up and deleted a huge rant I made, just for you. I don't have the time to double for you.
So, my stoner mind gets to bring up 3 of the topics on the forefront,
If you think you can directly replace such an important component in the environment, without adjusting your any of your own techniques.... c'mon....
you say 1lb/600... 450g/600, 225/300..... take it to the single, quality LED panels' draw... 150w pulling 4 ounces? That's been done. thats <0.75"gpw," I am one to think it is easier to achieve that goal, and then some, with LED, and THATS been proven time and time again simply by the same space vs lower over consumption.
Now expand that image back to an equivilent wattage... there is no reason why LED's cannot compete, WITH the same veg time... you're the one that brought up extending veg time, and that is not true, (not too mention you are getting the same amount of vegetation in less cubic space [tighter growth])
Coheen has the right idea of staying Green, no mercury, no disposing of bulbs, no thermal management, lesss electricity, plain and simple... HIDs use brute force.