QB96 Elite V2 w/ SSTX heatsink question

pulpoinspace said:
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
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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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Or_Gro said:
Can you take a few readings?
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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
 
pulpoinspace said:
at 16" using the shitty app on my phone i get 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 it looks similar if not better than cobs
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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.
 
Or_Gro said:
So about 1000 ppfd and 700ppfd, similar to diagram i posted earlier...Sweet!

Are your lights movable in the fixture? If so, probably an inch or two closer to center will bump center coverage.
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cool cool thanks, yeah after all that science i just did i was thinkin the same thing. and time to smoke a fatty.
 
Humple said:
Could have fooled me. You've been itching for a fight since that odd post you made about me putting you on ignore. I suggest you put me on ignore - it will be much better for your blood pressure.
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Yeah, these lights sure aren’t appropriate for a tent...
 
@Or_Gro is there a cheaper alternative for a spectrometer other than that $3000 one you are using? i would love to see what kinda results i'm dealing with in my setup.
 
rkymtnman said:
@Or_Gro is there a cheaper alternative for a spectrometer other than that $3000 one you are using? i would love to see what kinda results i'm dealing with in my setup.
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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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Or_Gro said:
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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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
 
rkymtnman said:
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
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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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Or_Gro said:
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...
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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
 
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