simple research after last post.
http://www.hidhut.com/catalog/led-su...ts-p-1758.html
this is website of hidhut(my friend hate this company, btw) and link for super-nova which 2nd LED growing lighting system from hidhut.

now, I wanna point out couple things.

9w LED = 240w HPS (WRONG)

I check 3 website(2from this original post and hid-hut) and i figure LED lights have about 15-20% energy consumption vs HID.
Which means 10w LED = 50w HPS = 50W T5 (at least)
which means(again!) 600w HPS can be replaced by 120-100w LED(if u have right spectrum LED lights)

and price to purchase 240w super-nova is $1,000. (240w super-nova is little better than 1,000w HPS or 2 600w HPS, their web-site said)
and price to purchase 2 of 600w HPS is about $1,000(this is how much i paid for it)

elec. bill per month of 2 of 600w (12/12) is about $40.
elec. bill per mounth of 240w super-nova(12/12) should less than $10.

now, you calculate.


I'm not really ready to change whole my lights to LEDs YET, but soon.
Before i do that, i have to figure out what light I will use to cover full-spectrum.
LED bulb has unique wave lengths. usually 1 LED light has many LED bulbs, and those bulbs can have only 1 specific wave length.
which means LED bulb is good for focusing little # of wave lengths(nm), and NOT good for full-spectrum(I can say any full-spectrum LED out there now, is bullshit)
so, to cover uncovered wave lengths(yellow, green, dark blue) by LED(red and/or blue), i have to use something naturally makes full-spectrum, such as fluorescent, incandescent, or HPS, MH.
(plants use red for flowering and blue for vegging MOST, doen't mean they use ONLY red and/or blue. they need all others too(far less than red/blue but YES).)

I'm still collecting info. for LED lights, and i have plan to change/compare very soon for both vegging and flowering. I hope i can post more info 1-2month later.