Or_Gro
Well-Known Member
Nice build, nice plants! What did you have in there previously?
QB96 Elite V2 w/ SSTX heatsink question
- Thread starter pulpoinspace
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- qb96 qb96 elite v2
Or_Gro
Well-Known Member
What are you driving that with?
pulpoinspace
Well-Known Member
thank you! i appreciate it. they were under 400W of cobs before.
specficially, 4 Vero29CSE @ 1400mA, 2 in 3000k and 2 in 3500k
using hlg-600h-54b dimmed to 66%
so from (4) 100w cobs to (4) 100w 96v2s
Airwalker16
Well-Known Member
He says a few posts up.
Or_Gro
Well-Known Member
You have a lux or ppfd meter, if so how's it reading at 400w?
Or_Gro
Well-Known Member
Sorry, didn’t see it
pulpoinspace
Well-Known Member
oh sorry i misread your question. i do have a cheap lux meter on my phone. ill check it out next time i'm down there
Or_Gro
Well-Known Member
How do you think intensity compares to same wattage cobs?
Or_Gro
Well-Known Member
Can you take a few readings?
Based on the three readings on the spectrometer earlier (spectrum post), there are approx 67 lux/ppfd as rough conversion factor.
Using this, and if you had similar cob readings, you can approximate ppfd under both set of lights.
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pulpoinspace
Well-Known Member
at an eyeballed 16" using the shitty app on my phone and my long skinny arm I got readings of about 68k lux under the boards, moving around the canopy the smallest number i could find is 48k around the corners and the very center.
overall using my very scientific testing methods they seem pretty similar to cobs
Or_Gro
Well-Known Member
So about 1000 ppfd and 700ppfd, similar to diagram i posted earlier...@ 400w...Sweet!
Are your lights movable in the fixture? If so, probably an inch or two closer to center will bump center coverage.
pulpoinspace
Well-Known Member
cool cool thanks, yeah after all that science i just did i was thinkin the same thing. and time to smoke a fatty.
Or_Gro
Well-Known Member
Enjoy man, beautifull setup and plants, and great new lights!
Gonna twist one here in a min.
Cheers!
Or_Gro
Well-Known Member
So, $400+$170/600w => 95 cents per watt at max
$570/400w => buck 43 per watt for 1000ppfd
Or_Gro
Well-Known Member
Yeah, these lights sure aren’t appropriate for a tent...
Or_Gro
Well-Known Member
Mine was 2200, someone found one for 1500, the next sekonic down is less expensive and does spectrum, but not ppfd (apogee ppfd meter is about 300).
A good lux meter (consitentcy is the key) is relatively cheap and can somewhat approximate a ppfd meter (using correct conversion factor).
@Randomblame mentioned a diy spectrometer for a few hundred $s, maybe contact him or he might post here?
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rkymtnman
Well-Known Member
thanks. i might check the local grow store and see if he has one i could borrow. i'd love to see what i got but don't want to spend too much on something i'd only use a few times at most
Or_Gro
Well-Known Member
The spectrum is definitely a luxury, unless you’re playing with new lights a lot.
The intensity meters (lux/ppfd) are something like a pH/ec/temp meter is to dwc...if you have one, you start to use it frequently, especially when you have diff ht plants, especially before stretch ends...
A few inches up,down,sideways can make a big deal ppfd-wise, eventho your eyes can’t really tell...
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I 2nd this my par meter was one of my best purchases it helps alot when the plants are growing fast or when dimming I've also started to notice what strains like the higher ppfd and what ones like lower ppfd