A 1000W HPS in a 2x4x8 space is A LOT of light but great if you can divert/control that heat. Your 650 cfm vortex should be plenty. I love those fans. In fact it sounded like overkill to me too like bigs mentioned. But if you are using it to vent out via a twenty foot run than it makes sense. Otherwise you could end up sucking your plants up out that sucker, lol.

If you were to shorten that run and add a potentiometer you would be adding some nice flexibility to your grow. You would then be able to possibly allow for a little more height in your girls rather than flowering so short.

Looks like youâ??re doing a great job though- newbie to newbie speakin!

Fun shit, huh?