Off the shelf retail store screw-in LED and CFL bulb comparisons

[NIKT]

At 25 degrees: start of operation without power supply: 5000K => 180 lm / W: 3500K => 175 lm / W:
Power supply efficiency. 0.93? Typical

: 5000K => 167.5[lm/W]: 3500K => 162.75 [lm/W]

25 degrees : 5000K 80 CRI SPD samsung :
very similar to b. 2,34 umol/J

25 degrees : 3500K 80 CRI SPD samsung. 2,29 umol/J

At the real operating temperature of the diodes:
it will be less by ?? -> 3% :-> [ even 6-7%, this is the case at higher operating temperatures ]

~3%

2,27 => 5000K
2,22 => 3500K

1:1 => 2,25 umol/J : system efficiency.

Without laboratory measurements, this is just a guess based on the data sheet. The parameters of the strips can be slightly colored upwards. Producers often do that.
You put diffusers on strips _ you additionally reduce the amount of available light by a few %.

Without (Ulbricht'a) integrating sphere _ and spectroradiometer, measuring it will be fun like I am doing. Determination of the distance losses depending on the wall coverage. this is easy - as is interpolation of the total efficiency of the source using a room-specific calibration curve. Assuming that the source is close to point. The problem is hardware grade _ TES1335 is grade B. + - 6% worst case.

I need this

Chinese producers of cheap panels show measurements made of it. Tes1335 is really better for white light.

SummaryKipp& Zonen model PQS 1, LI-CORmodels LI-190 and LI-190R, and Apogeemodel SQ-500quantum sensors had minimalspectral, directional, calibration, and stabilityerrors,and matched each other within about 4 %, suggestingthey can be reliably used for accurate photosynthetic photon flux density (PPFD)measurement.Apogee model SQ-100 quantum sensors performed similarly, exceptwhen measuringsomeLEDs,where spectral errors can be large. SpectrumLightScout andActive Eye/HydrofarmLGBQM quantum sensors are not research-grade instruments and should be used with caution when making absolute PPFD measurements. The LightScout hadlarge spectral and calibration errors, and the LGBQM hadlarge spectral and directional errors. The LGBQM was also unstable under electric lights. While the LightScout and LGBQMare low cost, the large errors indicate they can only be used to provide a relative indication of PPFD withtime for a given radiationsource,

 

[PCBuds]

Power supply efficiency. 0.93? Typical

I'm using two ordinary cheap power supplies.
They were a lot cheaper than a proper LED driver.

My voltage supplies are about 85% efficient, but the heat they produce is outside of the closet.

The parameters of the strips can be slightly colored upwards. Producers often do that.
You put diffusers on strips _ you additionally reduce the amount of available light by a few %.

Bridgelux is supposed to be pretty good at not coloring their parameters.
They apparently have high quality products with very little hype.

My strips run at 19.5 Volts, which is an odd number.
Most strips run at 24 Volts, so my strips aren't compatible with others.


I put diffusers on the strips because the LED segments can burn out if the plant hits it.

I just added 12 more strips recently and coated them with silicone modified conformal coating instead of the diffusers.

 

[NIKT]

My voltage supplies are about 85% efficient, but the heat they produce is outside of the closet.

why are you using such weak power supplies ?
costs ?

power supplies are usually placed outside the room.

Bridgelux is supposed to be pretty good at not coloring their parameters.
They apparently have high quality products with very little hype.

They have good products but

Typical : minimum :

1230 : 1107 + typical => Fv : power: and lm/W :

Under table :

+- 7% flux :

My point of view : =>

Without measurement data of specific pieces, I never trust anyone. a kind of lesson from life.
Maybe it's true or not, they are relatively cheap and good, but I do not trust 100%

https://cdn.samsung.com/led/file/resource/2020/09/Data_Sheet_LM301B_CRI80_Rev.10.1.pdf

bin:

VF and flux : b strips ?

smd2835 in b. strip => sorted somehow and selected? real parameters. I don't believe in anything. I assume it might be - but I don't believe it ... such a nature, unbeliever

I put diffusers on the strips because the LED segments can burn out if the plant hits it.
I just added 12 more strips recently and coated them with silicone modified conformal coating instead of the diffusers.

Panel manufacturers often cover the LEDs with something like you

 

[PCBuds]

I answered your question on my thread.

I took this thread off topic again.

https://www.icmag.com/forum/marijua.../micro-grows/360815-pcbuds-mini-grow?t=360946

 

[Legalcdn]

Quick question, is anyone running black light (385-400nm UVA) SILs with the covers off? These party lights are the same as UVA grow lights without the expensive price. UVA can be run 12hrs during flowering. The UVB spectrum are too strong and can only be run for a couple minutes.

 

[pothead66]

Sorry to detract the thread but maybe you guys can help.
I have a tent I want to separate into 2 different flowering chambers.

Both flower chambers will be 80 x 80 x 80 cm (2.6 feet) cubes.
Do you think this is overkill for a staggered sog in that space? >
195 w in a chamber

 

[Legalcdn]

Overkill. I used 20 in 3.5ft x 5.5ft with 2 plants (350w). 2 plants, about 14oz.

 

[pothead66]

Overkill. I used 20 in 3.5ft x 5.5ft with 2 plants (350w). 2 plants, about 14oz.

So what wattage do you think would be optimum in my space?
120 w ? Sounds too little.. 30 w / sq foot would land me at 120 w but with 40 cm unlit...
Maybe 3 rows of 5 bulbs at 10 w? 150 watts

L.e : I think I\ll settle on 120 w and see how that goes

 

[Legalcdn]

Look to scrog to flatten canopy. You can do 150w if you choose. Cooling is a big factor in that space.

 

[Terpene]

SILs produce great results between 20w per sqft to 30w per sqft. Anything over that is really just bragging rights and comes with ventilation (heat/humidity) issues. If you want to run a whole bunch of extraction, then run 50w per sqft, but the difference between 30 and 50 is pretty minimal and the same results can be achieved by simply growing slightly closer to the bulbs. Keep in mind, with 15-17w SILs you have a perfect growing zone 24-30" area off the diodes on the bulbs.

 

[Legalcdn]

SILs produce great results between 20w per sqft to 30w per sqft. Anything over that is really just bragging rights and comes with ventilation (heat/humidity) issues. If you want to run a whole bunch of extraction, then run 50w per sqft, but the difference between 30 and 50 is pretty minimal and the same results can be achieved by simply growing slightly closer to the bulbs. Keep in mind, with 15-17w SILs you have a perfect growing zone 24-30" area off the diodes on the bulbs.

Terpene,

Have you tried any UVA SILs? Most are 9w-11w in the 395nm wavelength.

The more expensive diodes are in the 365nm range that use deeper UVA. You should be able to run them 12/12.

 

[Terpene]

Terpene,

Have you tried any UVA SILs? Most are 9w-11w in the 395nm wavelength.

The more expensive diodes are in the 365nm range that use deeper UVA. You should be able to run them 12/12.

I have not, but frankly, I think the additional UV isn't as needed as you'd think. I have yet to see any difference in potency between CFL / LED (panels) / SIL / outside.

 

[PCBuds]

I have yet to see any difference in potency between CFL / LED (panels) / SIL / outside.

Just give her light.
She'll make use of what ever you give her.
It's all about cost and efficiency.
The sun is still free.


I might try candles or coal oil lamps next, but I might need 1000 of them. Lol

 

[TexasTea]

So Terpene mentions above that he has yet to see any difference in potency between the various lighting methods. Potency aside, since potency is not everything...has anyone seen any QUALITY differences between LED vs CFL vs HPS/HID? In other words, is there any loss of terpenes with the close growing conditions of these super light intensive micro cabs vs larger spaces? Would running a lower wattage series of off the shelf LEDs have any benefit over the larger wattage ones especially in the quality department? Or would you simply get less yield? Simmer vs boil.... I'm thinking about all the burnt tips I'm seeing...

I built a 10 x 14 micro cab a few years ago but only have used it for seed starting. I'm about to do a little flowering run in it though for fun this fall. Thanks to Blynx for his fabulous research and for sharing all this valuable info with the community. It really is amazing what can be done in such a small space.

 

[PCBuds]

I went from fluorescent tubes, to CFL, to LED bulbs and now to LED strips all in the same 21"X21" closet with about 48" of growing space as well as a 15" SIP container.

The biggest difference I noticed with my strips now, is that I can have the plant growing right up against the lights.

I can use all the space in the closet.

I don't have scorching issues or heat issues (my power supplies/LED drivers are outside of the closet).

I can grow a 400 gram+ plant in my closet and only need to ventilate for air flow, not to remove heat.

All the other light sources needed space around them to prevent burning.


This was my 400 gram plant.

This is my current plant.
I'm hoping for a one pound plant.

 

[PCBuds]

SILs produce great results between 20w per sqft to 30w per sqft...

Yes, but plants aren't square.
They're kinda round shaped.

I wonder how how many watts per cubic foot a plant can handle?

 

[PCBuds]

I only got about 3/4 grams per Watt with my 400 gram plant, but I did get a 400 gram plant.


It's not about the grams per Watt for me.
It's about the total yeild per plant.

 

[TexasTea]

That's impressive PC. Dang.....what strain are you running there? From clone?

 

[PCBuds]

That's impressive PC. Dang.....what strain are you running there? From clone?

Dark Devil crossed with Sugar Black Rose, feminized Autoflower seeds.

ReikoX made them and sent them to me.

Good seeds with good light makes big plants.

From clone?

I'm pretty sure that ReikoX is not a clone, but there may be more than two of him. Lol

 

[TexasTea]

Hehe...ok, so yeah, you grew these from seed rather than cutting. Gotcha.