my first grow was cfl, i am trying to see if i can muster a significantly bigger yield by considering switching to a 400w, and how much difference if any the electricity would be.

i dont have the offhand rating for the cfl's, but i am using 8 and they are decent wattage for CFL.

With the CFL's you'll use less electricity and veg just as good as the 400. However, it's common knowledge that the 400watt HPS is much better fpr flowering. I've grown some good bud with CFL's but my advice to you is to take that $150.00 and go to High Tech Garden Supply and order yourself a 400. Good luck.

Even if your CFL's were the 42 watters --- 42 x 8 = You're burning 336 watts for 21,600 lumens

With the 400 you're getting 155,000 lumens off of 400 watts.

400 watt lights are not 155,000 lumen's...and your bill will only increase by about 20 bucks max....

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http://www.sachydro.com/**Cali's Sea Of Green/purple**--*CALI'S Bong Rip Thread*--

^^yeh i agree!you could possibly get a hid that takes both mh and hps but coz youve got cfl's already you might aswell use them for vegging instead!

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1000 watt h-lux all the way 199,000 lumen's

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http://www.sachydro.com/**Cali's Sea Of Green/purple**--*CALI'S Bong Rip Thread*--

my bad,,,,,55000........

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so if 400 watts makes 155,000 lumens, then one would thikn twice the watts=twice the lumen output right? guess not. so would it not be more cost and lumen effetive to have two 400 watters right next to each other, or do you think the concentration power of the 1000 makes the difference.

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Hey Uncle Sam,
I am not a pot grower, i just think the girls look pretty... and smell good

400 watt lights are not 155,000 lumen's

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http://www.sachydro.com/**Cali's Sea Of Green/purple**--*CALI'S Bong Rip Thread*--

it's more like 55,000....look it up

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http://www.sachydro.com/**Cali's Sea Of Green/purple**--*CALI'S Bong Rip Thread*--

It was my error... I meant to / should have typed 55,000 lumens instead of 155,000.