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Search: Posts Made By: Beta Test Team
Forum: Growroom Lighting 06-18-2015, 03:45 AM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
That value converted to microWatt (uW), comes to...

That value converted to microWatt (uW), comes to 30 uW/cm^2, which is plenty to have a strong effect on Cannabis (that would likely be too much UV-B, when accounting for photoperiod hours). If you're...
Forum: Growroom Lighting 06-18-2015, 03:38 AM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
The round vertical reflector is the best shape...

The round vertical reflector is the best shape for optimal reflection (uniformity) and reduced re-strike of photons with best control of photon placement; this is why car headlights are vertical and...
Forum: Growroom Lighting 06-18-2015, 03:36 AM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
Thanks for posting. Was it in a dPap reflector? I...

Thanks for posting. Was it in a dPap reflector? I would have thought the reading to be greater.

Are you using the SolarMeter 6.0 or 6.2 meter? From what you wrote about 0.0 measurement, could you...
Forum: Growroom Lighting 06-17-2015, 02:03 AM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
Great to hear, glad you're happy and getting good...

Great to hear, glad you're happy and getting good yields.

I'll be setting up 6 Greenbeams in a 6'x12 area in the next two weeks. Looking forward to posting pics and yield numbers.
Forum: Growroom Lighting 06-16-2015, 08:05 PM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
Just to point out, if you're measuring the canopy...

Just to point out, if you're measuring the canopy (air) temperature, the leaf (plant) temperature will generally be a couple of degrees hotter than air temp.
Forum: Growroom Lighting 06-16-2015, 08:01 PM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
Yes, according to the work by Nelson & Bugbee....

Yes, according to the work by Nelson & Bugbee. About 0.03% of PAR range irradiance. So if your PPF is 930, you should have around 0.28 umol/s/m^2 UV-B, enough to have a positive effect if your...
Forum: Growroom Lighting 06-16-2015, 07:54 PM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
Thanks for posting your irradiance measurement. ...

Thanks for posting your irradiance measurement.

In terms of the CMH luminaire, I would suggest raising it a bit, maybe to 22-24", to get your PPF down to around 700-800. The reason is at around...
Forum: Growroom Lighting 06-16-2015, 06:57 AM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
The 942 have plenty of blue, at about 13-14% of...

The 942 have plenty of blue, at about 13-14% of total PAR range output, if I recall correctly. The Agro 930 (Greenpower) is around 11-12%, I believe. (Those figures aren't exact, but close without...
Forum: Growroom Lighting 06-16-2015, 06:50 AM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
Interesting idea about measuring temperature. I...

Interesting idea about measuring temperature. I have to think about it for a bit, but at first thought it should work to give an idea of reducing hot spots. That's really thinking outside the box,...
Forum: Growroom Lighting 06-13-2015, 02:15 AM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
Ah, I see. I thought you were using them for...

Ah, I see. I thought you were using them for flowering, as well.

It would still be worth it, I think, to use the 942 for a while and the Agro 930 for a while, to see if you like one over the...
Forum: Growroom Lighting 06-12-2015, 09:28 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
DE MH lamps are nonstarter, considering useful...

DE MH lamps are nonstarter, considering useful lifespan is 3,000-5,000 hours, at best case. Operating costs would be too great compared to Philips CMH and DE HPS lamps.
Forum: Growroom Lighting 06-12-2015, 08:00 PM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
If you have the 942 and the Agro 930 you may want...

If you have the 942 and the Agro 930 you may want to use one of each in your fixture, or, test the 942 for veg and flowering, and the Agro 930 for veg and flowering, separately in two grows.

I...
Forum: Growroom Lighting 06-12-2015, 07:54 PM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
Yea, the main difference between the 930 and Agro...

Yea, the main difference between the 930 and Agro 930 is increased % red range for the Agro, which increases the PAR range umol/s per watt value a bit.

If I recall correctly, Philips made the...
Forum: Growroom Lighting 06-12-2015, 07:30 PM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
Wow, I cannot believe that's at Home Depot! Great...

Wow, I cannot believe that's at Home Depot! Great find. That is the correct lamp, assuming the base is correct for your SunSystems (mogul vs. pgz).
Forum: Growroom Lighting 06-12-2015, 06:54 PM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
You would want the $85 lamp, however, that looks...

You would want the $85 lamp, however, that looks like the normal 930, while you would want the "Agro" version, now called "Greenpower."

However, rives or Jhhnn may correct what I wrote above, if...
Forum: Growroom Lighting 06-12-2015, 06:11 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Directly from the PDF to which you are referring:...

Directly from the PDF to which you are referring: "The full grow cycle for the plants using All - Bright™ lighting lasted 73 days. The lighting regime was 13 hours On 11 hours Off."

That is a...
Forum: Growroom Lighting 06-11-2015, 08:26 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Yea, the main area is specular (mirror-like),...

Yea, the main area is specular (mirror-like), which means the uniformity will be reduced, but the PPF will be greater under the reflector itself (so foot print will be smaller).

Good choice on the...
Forum: Growroom Lighting 06-11-2015, 08:19 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Thanks for pic inside, I didn't realize they're...

Thanks for pic inside, I didn't realize they're using specular material, that's too bad.

Diffuse is better for reflectors, by far, than specular, for the sake of uniformity of irradiance. Because...
Forum: Growroom Lighting 06-11-2015, 07:13 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
I for one wouldn't use that spacing just for the...

I for one wouldn't use that spacing just for the fact of uniformity; I would want to use 3'x3'. And the distance to canopy is important if you're using only one fixture.

It will work, sure, but...
Forum: Growroom Lighting 06-11-2015, 06:56 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Yes, I've picked up on that. :) Unfortunately,...

Yes, I've picked up on that. :) Unfortunately, canopy distance constantly varies. Footprint with a given light mounted on an 8 foot ceiling doesn't, at least not after you've done as you describe and...
Forum: Growroom Lighting 06-11-2015, 01:30 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
As both Avenger and Jhhnn have pointed out, yes,...

As both Avenger and Jhhnn have pointed out, yes, the GE lamp is inferior. Two of the reasons I think they may not have pointed out, but they both know I'm sure, is in terms of photosynthetic...
Forum: Growroom Lighting 06-11-2015, 01:18 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Jhhnn has already pointed out where you went...

Jhhnn has already pointed out where you went wrong with most of this post, but I did want to point out the issue of useful lifespan is different than average lifespan.

For example, useful...
Forum: Growroom Lighting 06-11-2015, 01:09 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
I suspect you're referring to the flawed claims...

I suspect you're referring to the flawed claims about blue (MH) for veg and red (HPS) for flowering? Such claims are based on flawed understanding of radiation use by plants and changes in sunlight...
Forum: Growroom Lighting 06-11-2015, 01:03 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Ah, science by extrapolation. That's always...

Ah, science by extrapolation. That's always valid.[/quote]
I take it you know little of scientific method, because it's perfectly valid to compare two consecutive data sets.

There was no data...
Forum: Growroom Lighting 06-11-2015, 12:44 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
I think we're fundamentally saying the same...

I think we're fundamentally saying the same thing, just in different ways. I'm more interested in the fundamental aspects while you deal with scientific study of the details.

My contention is...
Forum: Growroom Lighting 06-11-2015, 12:35 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
I don't recall, this was from more than about 2...

I don't recall, this was from more than about 2 years go. But I'm pretty sure they're weren't 8' from canopy during flowering stage, more like 5-6 feet I think. At harvest the canopy was about 4.8'...
Forum: Growroom Lighting 06-09-2015, 05:35 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
It doesn't matter that they compared past grow to...

It doesn't matter that they compared past grow to a grow with Greenbeams. The results would be the same if both grows were concurrent.
Forum: Growroom Lighting 06-09-2015, 05:31 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Well it's good you don't think it can be called...

Well it's good you don't think it can be called scientific, because no one called it scientific ;)

No I was no paid by Cycloptics. I did it as a favor to a friend.



No it's not sponsored....
Forum: Growroom Lighting 06-09-2015, 04:16 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Hey timmur, I'm the one that consulted...

Hey timmur,

I'm the one that consulted Cycloptics and the grower on that grow test, to setup and use the Greenbeams fixtures (e.g. in terms of goal PPF, room setup, etc.), and I also hung much...
Forum: Growroom Lighting 06-09-2015, 03:43 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Hey timmur, I'm the one that consulted...

Hey timmur,

I'm the one that consulted Cycloptics and the grower on that grow test, to setup and use the Greenbeams fixtures (e.g. in terms of goal PPF, room setup, etc.), and I also hung much of...
Forum: Growroom Lighting 06-09-2015, 03:14 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Meh? Really? Not sure why you always seem to...

Meh? Really? Not sure why you always seem to poo-poo the science I provide, considering our work is far better and more correct than past claims about Cannabis usage of radiation claimed by growers...
Forum: Growroom Lighting 06-08-2015, 10:21 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Oh, thanks for the link. Now I see it I do recall...

Oh, thanks for the link. Now I see it I do recall learning about it rives's thread. The thing about that reflector I don't like is it's specular, not diffuse reflective surface.
Forum: Growroom Lighting 06-08-2015, 06:44 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
There has been a ton of research into the topic...

There has been a ton of research into the topic of whether quantum sensor should use a flat (unweighted) measures of wavebands in PAR range, or weight the wavebands according to how plants' use them...
Forum: Growroom Lighting 06-08-2015, 06:42 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
I wasn't aware they made 630W CMH, thanks. For...

I wasn't aware they made 630W CMH, thanks. For what it's worth, the Double dPapillion has dimming feature, as well.


Just to point out, using 8 315W fixtures, rather than 4 630W fixtures would...
Forum: Growroom Lighting 06-08-2015, 06:02 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Gavita has a DE 600/750. Getting great reviews....

Gavita has a DE 600/750. Getting great reviews. That's probably gonna be my next light. For the money, there;s nothing sitting on the shelves that can beat it.

edit: Now that would be a fair test....
Forum: Growroom Lighting 06-08-2015, 05:48 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Bravo! Atta boy beta. What's your background...

Bravo! Atta boy beta.

What's your background man? Electrical engineer? Horticulture lighting business? Or just a hard on for the hobby?:biggrin:

Your stuff is in-depth man.[/quote]
Plant...
Forum: Growroom Lighting 06-07-2015, 10:34 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
I wrote that thread to which you refer, here: ...

I wrote that thread to which you refer, here:

"LED vs. HPS: Truth about photosynthetic eff. & uniformity"
https://www.icmag.com/ic/showthread.php?t=296665

And this one is also based on that...
Forum: Growroom Lighting 06-07-2015, 07:59 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
I was being sarcastic.

I was being sarcastic.
Forum: Growroom Lighting 06-07-2015, 06:11 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Good job bluerock, I'm sure you've convinced...

Good job bluerock, I'm sure you've convinced yourself you're correct.
Forum: Growroom Lighting 06-07-2015, 05:06 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
I haven't gone off topic. Lux was asking...

I haven't gone off topic.

Lux was asking about 1000W DE HPS (as Gavita) vs. 630W CMH, which I have posted about (regarding spectra differences, etc., see the first page). And billyboat mentioned...
Forum: Growroom Lighting 06-07-2015, 04:36 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
About that testing I did in the post above, the...

About that testing I did in the post above, the two tested lamp wattage were 600W and 360W, so the lower wattage was 60% of the higher wattage. And in terms of 1000W DE HPS vs. 630W CMH, the lower...
Forum: Growroom Lighting 06-07-2015, 04:23 AM
Replies: 284
Views: 107,098
Posted By Beta Test Team
What I'm stating is if the PPF is the same at a...

What I'm stating is if the PPF is the same at a higher plane, then the PPF will be similar at a lower plane, for point source radiatoin (so, a single fixture, for example), even if one luminaire is a...
Forum: Growroom Lighting 06-07-2015, 03:17 AM
Replies: 384
Views: 87,957
Posted By Beta Test Team
Off topic question Dr. Fever: I don't see the...

Off topic question Dr. Fever:
I don't see the quantum sensor, do you have a link? I only see "light sensor" listed, which I take to mean a sensor that monitors light vs. dark, but not measure PPF....
Forum: Growroom Lighting 06-06-2015, 11:15 PM
Replies: 384
Views: 87,957
Posted By Beta Test Team
I agree first hand experience is worthy of...

I agree first hand experience is worthy of consideration, however, the problem with asking growers what works better is they very often do not carry out appropriate comparisons.That is, most every...
Forum: Growroom Lighting 06-06-2015, 10:56 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
Electrical efficiency? Adequate? HPS DE is...

Electrical efficiency? Adequate? HPS DE is superior precisely because it is more electrically efficient than CMH. And "damned fine cannabis"? You can grow the same with T5s....but you won't touch the...
Forum: Growroom Lighting 06-06-2015, 09:22 PM
Replies: 384
Views: 87,957
Posted By Beta Test Team
Here you go, I analyzed that study by Nelson &...

Here you go, I analyzed that study by Nelson & Bugbee and provided a lot of context, some time ago. Note that photosynthetic efficiency tests (in the integrating sphere) weren't conducted by Nelson &...
Forum: Growroom Lighting 06-06-2015, 08:53 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
You're missing the point of my post to the other...

You're missing the point of my post to the other member, I think. That is, if PPF at the canopy is the same for two different fixtures, and all other factors are the same (e.g. wall reflectivity),...
Forum: Growroom Lighting 06-04-2015, 09:06 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
You're looking at the wrong issue, I think. The...

You're looking at the wrong issue, I think. The only thing that matters is PPF (i.e. intensity) at canopy (not fixture radiance), in terms of plant growth (spectrum notwithstanding, where CMH is far...
Forum: Growroom Lighting 06-04-2015, 08:48 PM
Replies: 284
Views: 107,098
Posted By Beta Test Team
I have rooms with Epap's, Nano's, and my buddy...

I have rooms with Epap's, Nano's, and my buddy switched from epaps to gavitas, and my Epaps are the lower yielding fixtures in all of my rooms. They just don't penetrate as much as my other...
Forum: Growroom Lighting 06-02-2015, 09:27 PM
Replies: 4,685
Views: 539,582
Posted By Beta Test Team
Very cool, nice work!

Very cool, nice work!
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