Quote Originally Posted by pow420
Ok i would like to start a grow my cabinent will be 3'6''h x 20''d x 20''w using a 400 watt HPS growing 4-6 plants at a time. The questions i have is can i use the HPS light threw the whole grow and get the same yeild if i would of used a CFL for vegging and HPS for flowering?

Is mylar very effective compared to white paint?

Can i water the plants with tap water or should i use a water with the proper PH level?

Is 2 intake fans, one blowing on the plants and one blowing on the light, and one exhast fan be enough to keep a good tempature?
Hey PoW... welcome
Yields::: HPS 100% vs CFL-HPS
I would think that your better yields would be with the HPS all the way. Use your CFLs for the seedlings. Or run all bulbs all the time... ???

What CFLs do you have?

::::::
Mylar vs white paint.

Yes, use Mylar if possible. There's a very good explanation in the FAQ section.

Correct pH water will give you better results... IMO.

As to the fans::: You've got to do some testing man... test, experiment, and test some more.

Try out different setups... until you find out what works.

Best dude,

-turtle420
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