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Off the shelf retail store screw-in LED and CFL bulb comparisons
- Thread starter blynx
- Start date
Some of those figures wrong. As an example, 4 Osram lamps were used over a meter. The middle 15x15cm was measured with an uncalibrated lux meter. The other 24 boxes were guessed. Then the average used to calculate the ppfd.
Interpolation is filling in the gaps between known values. It can't be done with just one value. There is no gap to fill.
Interpolation is filling in the gaps between known values. It can't be done with just one value. There is no gap to fill.
If you are right then it doesn't sound right.
I don't get it, that guy has a meter. Then he spends a lot of time to edit those nice pics. Why not move the meter after each measurement and post all real measurements, taking shortcuts at the editing phase, not measuring phase. I mean those real measurement values written in a makeshift table would be much better than bogus values presented in a nice style.
I don't get it, that guy has a meter. Then he spends a lot of time to edit those nice pics. Why not move the meter after each measurement and post all real measurements, taking shortcuts at the editing phase, not measuring phase. I mean those real measurement values written in a makeshift table would be much better than bogus values presented in a nice style.
NIKT
Active member
1 lamp -> mirror : data : Its almostt the same.
It's cheaper than 4 lamps _ there are similar : not the same : every lamp i slightly different but u now.. The difference betwen lamp => is less than 3% ??
There is no gap : u ar right => interpolation : ok : deferent meaning : My English is.. like shit. This is interpolated : from data :
It just fun
calibration ?
you can check
in this way : for example.....
lamp on box 2452 lx
Measurment after : mod : ~2600 : minus _ ~ % on "plastik" : ~2200 lx :
30 cm and 20 cm ->
~2,1 umol/J
correlation:
https://forum.haszysz.com/threads/pomiary-żarówkoledów-i-nie-tylko.126211/page-15
next:
KDE
on box : 960
80% of checked lamp are very close to declaration on box.
It is => good enough : +-4% : ?? maybe ??
the difference between a white plate and aluminum foil: it is rather
of real naturebelieve it or not believe. who cares about it - it's just fun
with tes1335.
NIKT
Active member
That's my meter PCBuds. Give it back
3:1 math ratio. 20K is 600ppfd. Or 25K is 750ppfd. It's just x3 and fudge it. I like that.
I wrote it on a sticker for the back panel. I have too much to remember. Like.. where did I put the sticker
?? Sorry _ this is to hard to understand : with different words please :
https://www.biorxiv.org/content/10.1101/289280v1.full.pdf
Source data:
https://lamptest.ru/review/02330-diall-7219682701/
| Мощность, Вт | 14.5 | 13.6 | 93.8 |
| Световой поток, лм | 1521 | 1471 | 96.7 |
=> test :
13,6 => 14,1
1471 -1472 => mod : 1692 :
diffuser :
left diall 14,5 right philips 8 W ;
pila 8w [ pila=philips]
philips 8 W
it's just fun. How reliable is it
?? I don't know :lol:20K _ CCT ?? CRI ??
3000K : 70 CRI => 282 : 80 CRI => 290 : 90 CRI => 314 ...
5000K : 70 CRI => 270 : ..........
NIKT
Active member
Thanks.
Topic name => Off the shelf retail store screw-in LED and CFL bulb comparisons. ??? on topic?? bridelux ?? generation ?? II - III
tool =>
==> It's just a bunch of stupid numbers. :: ok.
greetings
ps: _ very nice vertical something there _ light up successively as it grows + sliding lighting from the top ??
His light meter will read 20,000lux at 600ppfd
The 881 light meter will read 25,000lux at 600ppfd
The 'Dr Meter' will read 31,000lux at 500ppfd
That puts the Dr Meter reading nearly double what his meter reads.
Many people have tried to publish conversion charts from Lux to PPFD but it's not possible. Only when you put these meters together do you get to see how different they really are. I can explain why, but it's not helpful.
PCBuds I feel your pain. The whole thing seems to revolve around illuminating a 2D surface. Not what a plant can take. It's what leaf surfaces can take. You collectively light your plant to a good level, but at no single point can a meter see this. I have loaded up my canopy to the edge of causing problems, then put on my lower canopy lighting and the plants were not pushed over the edge by that 25% more illumination. Illumination I couldn't add above.
Edit: I know my lights are about 2.6umol/j so I often look at the power meter to judge their output, knowing about 75% of that will equate to canopy illumination. There is more exact math you can do, just it's only a couple of percent different. This 25% loss has been seen in fairly broad studies. Checked against my meters to.
PCBuds
Well-known member
==> It's just a bunch of stupid numbers. :: ok.
greetings
ps: _ very nice vertical something there _ light up successively as it grows + sliding lighting from the top ??
I love daffy duck !!
He's my favorite cartoon character!
I've found that I just give my plants as much light as I can afford.
Whether it's strips or SILs.
I watch the plant, and she tells me if she's happy.
NIKT
Active member
Now i understand. Please very simple lenguage ;]
I understand what you were talking about. Tes1335 is quite predictable in this respect. It has been checked. similar to =>
the error under each spectrum is slightly different but there is no need to calibrate for each spectrum.
The measurements come close to the declared and theoretical predictions.
if you take the box data and multiply it by 1.1 or 1.12 -> the results are very close to what comes out in the source efficiency measurements. The flux is lower - because the power of the source decreases with the temperature . Most of the lamps on the market are relatively close to the declaration, they, unlike the manufacturers of plant lamps, cannot lie that much
.The results for 2 lamps tested on the site lamptet.ru were used as a reference . Very similar, except for the power, the meter I have makes a big error with low values of about 0.5 W + -.
The error is definitely bigger than in the case of the scectroradiometer
_ but what works out too well with the data that is. I thought it would be + -20%: And maybe + -5%;]. Just fun: nothing more than a hobby.LM301H ? LM301B ?
PCBuds
Well-known member
Yes Bridgelux Gen 2 strips.
Really cheap. $3.50 each.
I switched from SILs to strips for space reasons, I have a small 21"X21"X48" tall closet.
3/4's of my lights are on the walls.
My light meter is kind of useless in trying to get readings.
I have more light coming in from the sides than from above.
If all my lights were from above, the readings would be completely different.
The plants seem to handle the light better when it's coming from all around.
I have all the lights on all the time, but I have them turned down for a seedling.
The strips are 1,200 lumens each, which gives me 53,000 lumens in my closet.
That's way too much according to the math and science but it's working for me.
NIKT
Active member
2.6 umol / J with the 2nd generation? About 2.5 of the III is possible if you let it go below specification and keep cool. With a power efficiency of 0.93.
At what current? below 350 mA?
Gen III at 250 mA => ~2,6 umol/J
Based on dependence on the manufacturer's documentation. Very optimistic. I don't know how real it is. Manufacturer's documentation _ form of advertising.
Gen II ?? ~ >200 mA ??
ps: This is a classic vertical cultivation. This was done 20 years ago on T8 fluorescent lamps. Nothing new.
PCBuds
Well-known member
2.6 umol / J with the 2nd generation? About 2.5 of the III is possible if you let it go below specification and keep cool. With a power efficiency of 0.93.
At what current? below 350 mA?
Gen III at 250 mA => ~2,6 umol/J
Based on dependence on the manufacturer's documentation. Very optimistic. I don't know how real it is. Manufacturer's documentation _ form of advertising.
Gen II ?? ~ >200 mA ??
The Gen 3 strips are three times the price.
I figure that I get more bang for my buck with the older strips.
I run my strips at 350 mA.
I turn them down when the plant is young.
Running at the test current (350 mA) the strips don't get too hot, so I don't need heat sinks or fans.
They run a lot cooler than all the SILs that I've had.
I had crappy Walmart 10 Watt 800 lumen SILs.
I actually started with a 4' 4 bulb T8 fixture in my closet.
The only way I could stuff it into my closet was to jam it in vertically against the back wall, so I started off growing vertically by accident.
It really seemed to work well, especially in my tall skinny closet.
I can let my plants grow naturally without all that training to create a flat canopy.
I don't like a flat canopy.
It's 2 dimensional and unnatural and too much bother to create.
NIKT
Active member
2,2~2,3 umol/J ??
Low end lights. ~ 1,4 umol/. ??
SOG.
16_20 years ago ?? Old overgrow _ cheep T8 shop lights. flat canopy. Made in USA. [ micro :lol:]
In my country V_tac 15 W _ 20 PLN ~ 5,35 $ : ?? => 2,3 umol/J after mod. like this : =>
https://forum.haszysz.com/forums/lampy.5/
=> https://forum.haszysz.com/threads/l...pecie-v-tac-na-uluminiowych-profilach.126568/
6400 K :
PCBuds
Well-known member
I don't really know.
Here's the data sheet on them.
My strips are half 5000k and half 3500k, 280 mm long. (L0280Z)
I only grow one plant at a time so my electricity bill doesn't add up to too much.
My closet runs at about 400 Watts.
For you, with a large grow, the numbers start to add up to a lot more, where investing in better SILs makes things more cost effective.
I don't quite get 1 gram per Watt with my grow, but I do get 400+ grams off my single plant.
