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LED and BUD QUALITY
- Thread starter Tropical Sun
- Start date
Gogin_Diddle
Active member
LEDs definitely have 1 thing on HIDs. They take much better pictures
xet
Active member
Not all HID's are orange 2100 Kelvin lamps.
The HID's ~5000 Kelvin+ will take excellent photos.
HID's come in a range of colors, CRI, gases, and spectra all the way up to 20,000 Kelvin (for comparison, the temperature of the sun regularly exceeds 20,000 Kelvin on the equator at high noon while the sun itself is widely agreed upon to be a constant black body radiation source ~5500-5800 Kelvin).
e.g. https://www.amazon.com/dp/B00RHHG8FA/ - 20,000 Kelvin
https://www.amazon.com/CBConcept®-Double-150Watt-14000K-Aquarium/dp/7200067490 - 14,000 Kelvin
https://www.amazon.com/dp/B0948TVC1W/ - 10,000 Kelvin
https://www.amazon.com/dp/B007ZU6J8K/ - 7500 Kelvin
https://www.amazon.com/dp/B00XWRD9S8 - 7200 Kelvin
https://www.amazon.com/dp/B0057IKGZ4/ - 6500 Kelvin
https://www.amazon.com/dp/B08MPSVYS4/ - 6000 Kelvin
https://www.amazon.com/dp/B00GBTXF5Q - 5500 Kelvin
Check out this grow mixing Metal Halide HID's and LED
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Diffusers seem to help a bit. I put thin – 0,8mm, clear diffuser sheets under my small diy veg light and it helped little but didn’t take all the heat out of the light.So, if I have understood how LEDs works, the problem can be solved with a simple translucent film (diffraction). Or not?
The problem with diffusers is that they trap heat and so shorten the life span of led chips – the hotter you run your lights the bigger the problem will get.
Corpselover Fat
Active member
LoL where did you learn that? The photons certainly lose no energy between the diode and your plants.
Corpselover Fat
Active member
I've used HPS, CMH and LEDs. I would never go back to hid.
Ca++
Well-known member
Works really well with tomato's but our canopy is a bit sticky.
Don't get me wrong though. I have been using lights where people claim they won't work for decades. The influence the naysayers have over the sheep is stronger than facts though. We do have a side-lighted diary here on IC, but people don't recognise it
What ”energy”?
I’m very clearly talking about heat radiation in that post you quoted.
Are you claiming photons hit the plant tissue just as warm as they left the diode and that the air doesn’t cool them down even one bit?
"LOL. Where did you learn that" ..f-ing idiot
You’re just like the few other geniuses in this thread; You can’t comprehend what you have just read – then you make a false claim - and then start mocking the other guy based on the stuff you just made up yourself.
No wonder people get fed up with ICMag and leave. We have too many shit talkers like you on board.
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@Koondense. I know you “like” this kind of stupidity – comments that are more on your level.
You’re a “professional” to whom the real meaning of reflection in physics is whatever other people tell you it is, and you change your views based on what other people tell you the “facts” are on that particular day. A clown job professional.
You can’t make a conclusive statement about it thou you pretend to be such a pro. =Photons instantly bouncing off matter vs. being absorbed and then re-emitted works for you just fine as the same thing – thou they clearly aren’t the same thing, cause you’re a two-bit parrot.
Corpselover Fat
Active member
Not even one bit.
If there isn’t any “energy” loss from leds between the diode and the canopy, explain to everyone why the ppfd reading goes down when the light fixture is raised higher. It shouldn't if what you just wrote is correct.
@Cerathule , maybe you can help your boy out a bit, you’re well read person
Do you people spend anytime actually thing about this before you react?
I’m sure you guys can now see how f-ing stupid this gets over here?!
Ca++
Well-known member
Photons don't have a temperature.
Lets keep this simple enough for anyone to understand. I'm telling you that photon's have no temperature to loose. Prove otherwise or accept it's you that's making stuff up.
No insults. No talking about some other aspect to find a win. Photon's can't loose any temperature, because they don't have one.
Man, you are smart! LOL
Place a temp meter under you led light 1 cm away and write down the reading when it stops rising.
Then hold the meter 100cm away and take down the reading.
Do you see any difference?
@Cerathule you too, buddy.
Cerathule
Well-known member
Hey, no offense I'm just in a silly mood from excessive smoking
So a photon can only change its frequency, which can be expressed as wavelength (in e.g. nanometer nm) as well and that correlates with its energy.
The diminishing of what you call "heat radiation" is due to the spread of the photons due to the fixtures beam angle. Diminishing their numbers with distance.
The modern LED light can be considered "more cold" in comparison to a HPS lamp, but that is due to the HPS emitting much IR. The LEDs light is still more energetic, ie. higher raw amount of photons pumped out each second.
But not everytime a photon gets absorbed by matter, it causes an increase in local heat. The energy of the photon can e.g. be used to engage a chemical reaction, like in photosynthesis. Then the heat is stored latent within the organic matter, deconposition sets it free (we use that in biofuel generators). It can also be reflected, cause ionization... so the radiative heaters use specific IR wavelength to transfer heat energy onto matter.
I just popped in to see where LED's rank these days. Saw some really cheap ones from china. Very simple google search on photon temperature -
www.quora.com
What is the temperature of a photon?
Answer (1 of 12): Photon are cold as ice… It is only when an electron capture a photon that we can attribute any type of energy. What is the temperature of ultrasound? The same as the air in which it travel? How can we weld plastic with ultrasound? Indirectly, the heat comes from the friction ...
Thermal energy is emitted photons. Infra red radiation etc. are photons too
Thermal radiation - Wikipedia
