Which way for air flow

Ok I have two thousand watt dual spectrum bulbs inside hooded boxes
My question is do I have the 400 cfm fan blowing from the end of the second light through the second light and first light into the duct or do I put the fan in the middle of both lights and have the fan sucking the hot air from the second light blowing through the first light into the duct or do I put the fan at the beginning of the first light sucking the hot air from both lights?

I have a 250 cfm in the middle of the two lights and the lights are on only 500w and my temp is near 90. I do have the 400 cfm fan on order
Any help would be appreciated

First option sounds the best to me!! I might do that!!

I would always hook it up to suck through the lights imo you can then have the option to have a y duct on it and use the one fan for 2 lights

Your 400CFM fan should be on the end of the chain, after all the lights DRAWING air through your hoods. The second fan can be anywhere else in the chain and will give you about the same results. In between the two hoods is fine, or before the first hood is fine also. You want to make sure you will have 250CFM of total flow through your hood while air cooling. I'm sure you'll be hitting that with both of those fans hooked up.

Dubdeuce said:

Your 400CFM fan should be on the end of the chain, after all the lights DRAWING air through your hoods. The second fan can be anywhere else in the chain and will give you about the same results. In between the two hoods is fine, or before the first hood is fine also. You want to make sure you will have 250CFM of total flow through your hood while air cooling. I'm sure you'll be hitting that with both of those fans hooked up.

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I would figure there's more power when the fan is pushing air that's why I figured put it at the beginning of the chain? There doesnt feel no where the sucking From the fan than when it blows berrump bump bump Lol
There's some heat in those hoods at just 500 watts wouldn't it be better to push the hot air in the duct?
I was talking using just the 400cfm fan but the better way is using both?

Budist said:

I would always hook it up to suck through the lights imo you can then have the option to have a y duct on it and use the one fan for 2 lights

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You talking about pushing the air through the boxes into the duct?

you want the air flow sucking to the fan not blowing from the fan

Budist said:

you want the air flow sucking to the fan not blowing from the fan

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Would it be better if I put he 250cfm fan atthe beginning blowing air through to the 400 at the end?
Like the previous member said?

doingfine said:

Would it be better if I put he 250cfm fan atthe beginning blowing air through to the 400 at the end?
Like the previous member said?

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for 2 lights 400 is enough. if you look at my grow journal my inline fan runs 340 cfm and has 2 1000w lights in separate areas. my lights stay very cool!