the solar powered idea is great, though the website looks like it hasent had an update since 1996 lol.
My next closet grow will start in june and i'm planning on adding some LED penetration lamp(s) and maybe fill some more empty space with CFL, to attempt to grow one super sized auto.
When i keep my closet door open a crack for air I can see my individual LED spectrum clearly. As the door opening gets wider the spectrum merges together of course, but my basic thinking is that parts of the plant may be hit with more blue light than red light over a 24 hour period, or vice versa. I would prefer to 'rotisserie' the plant so that it evenly 'cooks' for 8-12 weeks @ 82degrees
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Of course all of this could be complete hogwash as I've not seen any noticeable difference between parts of a bud, or even different buds on the same plant. But hell, it's 4/20 and i'm stoned at 10am in the morning!