enough lighting

Hi guys I'm new at this so I have a few questions. First off my new grow room is around 8 by 5 by 8 and I have 2 separate light fixtures. Both 2 by 4 t5 flourescents with 8 54 Watt 3500 k bulbs in each, producing 40000 lumens and 436 watts per fixture. I was planning on using DWC with 4 plants under each light totalling 8 plants. Do I have enough room and light for this many plants and if so what kind of yield should I expect.

don't think you've got the right bulbs ???

depends on phase, but yeah, 3500k isn't ideal any way you look at it (though it's not as bad as some kelvins you could have gotten ). Also if you plan to veg with this, the lack of blue spectrum (around 5500-6000 kelvin) will cause a stretch as the plants believe they are only receiving reflected light and will attempt to grow out of whatever is surrounding them (at least that is what they think is happening).

I have had a lot of luck vegging under a mix of 2700 and 6000 bulbs in a 8-bulb 4' t5.
Also, charts are good, but you have to take them with a grain of salt. There is no direct correlation from wavelength and kelvin, since one indicates a specific color of light, and the other indicates the radiation absorbed by a black body (meaning it measures a range of light spectrum). Ideally you would choose lamps which peak in the four chlorophyll peaks, and to do that you'd have to see actual spectral breakdowns for the bulbs.

Okay say I get the proper bulbs. Which I believe should be 6500 k for veg and 2500k for flower. I failed to mention that I have a third fixture the same size as other two. Its going to be for mother and clones using 6500k 54 Watt t5 ho bulbs. Is this lighting correct and what can I expect my yield to be.

yeild directly coralates to veg time so its a none fixed variable t5 yeild more then cfl but not near what hid will

Vonkins said:

Is this lighting correct and what can I expect my yield to be.

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yes that's correct, expect half a gram/watt once you've mastered your growing skills and techniques it could improve. You could grow half 6500K & half 2500 K (do they make T5s in that spectrum?) throughout too.
The Scrog style growing is ideal for T5 growing.

Should ihave both lights in the closet touching side by side with all 8 plants in the center or have a 2 foot gap in between lights and have four plants under each light. Which sounds better. My grow room is 8 by 5 by 8

you want them side by side. whether it fits your scheme or not the light is more intense, it's hard to explain but the each tube boost it's neighbors power to penetrate deeper into the canopy.

Will 8 plants grow well and have enough room under the two 2 by 4s. And is it possible to yield 1 gram per Watt with t5's

Vonkins said:

Will 8 plants grow well and have enough room under the two 2 by 4s. And is it possible to yield 1 gram per Watt with t5's

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depends how big you let them get.
with perfect conditions I think it's a reasonable goal of a gram/watt.

I plan on upgrading after first harvest maybee two 400 hps two 600 not sure yet but I believe the two T5 s will work good for now

Vonkins said:

I plan on upgrading after first harvest maybee two 400 hps two 600 not sure yet

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you can always use the t5s for sidelights (flowering) if you do go that route

Can I flower white widow and ak47 for ten weeks leaving the light on for only 8 hrs a day for the 9th and 10th week. Is this correct?

Vonkins said:

Can I flower white widow and ak47 for ten weeks leaving the light on for only 8 hrs a day for the 9th and 10th week. Is this correct?

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I'm confused, is the question "Do I flower for 12/12 the first 8 weeks then drop down to 8 on 16 off for the last two weeks ?
You could if you want. I don't know any reason why you have to though, the less light would deminish your yield, that's my only comment.

Can I flower white widow and ak47 for ten weeks. Leaving lights on only for 8 hours a day for 9th and 10th week. Is this correct?

I read somewhere doing that with white widow would increase crystal production

It was on the attitude seedbank website. Where it describes white widow.

OK, figured it was something like that. Your welcome to try it, if it works great, if not it probably would be a negligible loss by then anyways. I'm usually growing newish strains that don't have any pool of advisors with tips to that degree.