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Where E is photon energy, h is the Planck constant, c is the speed of light in vacuum and λ is the photon's wavelength. As h and c are both constants, photon energy changes with direct relation to wavelength λ
.Output is one factor, for sure. ...but the source of output matters.
"no magic photons" applied more to the Kessil marketing that insists PAR meters don't really define their output which is mostly BS..
Also those that insist MH produce "magic photons" when it is just a matter of wavelength and quantity (and directionality).
There may be something but it isn't magical.. thus the sarcasm..
Much if the incident sunlight is "directional" ..see the harsh shadows. More LED than T5..
.
You are referring to bandwidth differences not one "pack" of 660nm red photons from the sun are inherently "different" than the same amount from an LED (or ANY source)..
and as to using 6500k.. well 100% agree w/ you..just not "popular" anymore..
SOURCE doesn't matter...Only quality (content) and quantity..
Below is an extract from the manuscript titled “The Singularities and the Space Particles (SP) Theory- The fundamental structure of subatomic particles) which has just been submitted to the International Journal for Theoretical Physics by the author (Mahmoud Nafousi).
Photons with various energy levels, hence the law E=h*f where E is the energy, h is the Planck constant (or a single string of energy) and f is frequency (i.e. the number of strings in the photon).
So the various frequencies of any photons are determined by the number of the E Quanta linked/ joined in a chain like structure. This explains why all Photons of different frequencies/ vibrations travel at the constant speed of light.
The greater the number of the E quanta in a photon the more squeezed they are within that photon leading to its greater vibration/ shorter frequency. The photon has a spin of 1 and it is theorised to be its own antiparticle. This would imply that the photons are made of a chain of double E strings made of R-L and L-R helicity.
Different clusters of E quanta (with their rotational/ orbital angular momentum) form the various energy clouds of all the Fermion and other subatomic particles. The vibrating and flexible fabric of space is also made of the E quanta
Do you know what would be the difference between "infra red" and "thermo infra red" in the spectrum?The UV degradation plays a huge part, but then so does the heat once the plastic is degraded. The plastic gets damaged over time and then it is impacted more by the heat. Tanks that are stored outside in the sun also have this issue, only much faster. Acrylic, especially cheaper grades, can get serious damaged by this as well. The typical story is that a tank would be fine for years and then all of a sudden, this would happen... the lights did not change, but the plastic did over time. If it was just heat, then it would be almost instant since most bulbs burn more hot with more output when they are being broken in and are brand new.
Just with fans, my plastic trim is not even 100 degrees, but that is enough if the plastic is compromised. I only run 250W HQI though, which are not quite as hot as 400s, but significantly more hot than 250s on M58 or electronic.
This was a larger issue for SE bulbs since DE have a larger glass shield, but DE would still have this happen. It was a HUGE issue for folks who shined a bulb directly over a brace since it got a lot more waves than off to the side.
This is why Oceanic claimed to make their braces out of glass.
Even without the heat, the plastic will eventually get crumbly and brittle with lots of UV exposure... the cheaper the tank, the worse off. Then, the pressure of thin glass panels pressing apart could snap them. This could be a problem for LED folks as they start to introduce real UV and not BS/marketing violet and calling it UV.
Anybody with LEDs, please keep in mind that even though your manufacturer might call stuff UV, spectrum over 400nm is just violet and not a danger. Real UV of danger will be 350, 360, 370 and 380 chips, which are not all that common in most fixtures yet, but are being added more and more. These are important to the coral, so they are worth having... just keep an eye on the plastic stuff and order tanks with glass or metal braces if you are worried.
I would like to know the source of the graphic, if possible.
Red area is the PAR range. Most LED's will have little or nothing beyond the red lines
Blue is "extended" PAR range..
Curious as to the % energy in those defined ranges..well IR to 850..sadly chart only goes to 800
Ignoring the morphological and pigment changes for the moment.. and still just considering any growth enhancements past 725
In case you are misunderstanding me .. this is an honest request since you did raise a good, and overlooked point..
Do you know what would be the difference between "infra red" and "thermo infra red" in the spectrum?
Grandis.
The "thermal imaging" region, in which sensors can obtain a completely passive image of objects only slightly higher in temperature than room temperature - for example, the human body - based on thermal emissions only and requiring no illumination such as the sun, moon, or infrared illuminator. This region is also called the "thermal infrared".
Thanks!http://www.advancedaquarist.com/2008/10/review
most of my MH charts come from here.. Not the same as above but related..
LWIR, IR-C DIN
I was actually thinking that the terms would have a relationship with numbers, scientifically speaking.Grandis - you will be better off using the wavelength numbers and not the labels.
There is so much BS with names and labels, intentional and also unintentional, that this will be more clear. For example, 410nm is not ultraviolet to the rest of the world, but if you are selling Reef LEDs, then it is.
Huh? No.. there are plenty of true UV-a UV-B diodes..I was actually thinking that the terms would have a relationship with numbers, scientifically speaking.
So basically LEDs will never be able to have a true UV unit for aquarium applications, unless they make it out of glass in a special unit, or something... still won't even compare to MHs. It will definitely be so expensive that would be only for fashion people to use.
Grandis.
Warning
Actinic UV danger for eyes and skin
Ultra violet radiation in the wavelength range of 200-400nm may cause inflammation of the cornea as well as a UV erythema (sunburn) of the skin. The biological effectiveness of the UV radiation varies in the stated wavelength range and is described with the spectral response function (weighting scale) SUV.
UV-A danger for the eyes
Ultra violet radiation in the wavelength range of 315-400nm (UV-A) is for the most part absorbed by the eye lens and may cause UV cataracts (clouding of the lens of the eye).
people on this board cannot understand that LUX and PAR meters do not capture all of the usable output..
Unlike metal halide lamps, LEDs in the 400-700nm range that are used in aquarium fixtures do not emit UV radiation and that is one of the reasons Orphek now incorporates high range UV-A LEDs in their systems. The beauty of this is that unlike metal halide/HQI lamps, the UV-A output can be controlled thereby providing safe and beneficial levels for the corals while still bringing out the beautiful fluorescence of the corals. Orphek’s UV LEDs are in the range of 380-400nm which enters the visible range which produce a small amount of UV yielding a bluish purple light causing the corals to fluoresce while improving photosynthesis within the corals.
The same year they received patent for infrared LED. Nick Holonyak Jr., employed in General Electric, developed in 1962 first light-emitting diode that emitted light in the visible part of the frequency range. It was a red LED. In 1972, M. George Craford, who was a graduate student of Holonyak, invented the first yellow LED and a brighter red LED. Thomas P. Pearsall developed high brightness light-emitting diode in 1976, for use with fiber optics in telecommunications. Shuji Nakamura of Nichia Corporation made first blue LED in 1979 but it was too expensive for commercial use until 1994. Light emitting diodes can now be made in one or in more colors. At first Light-emitting diodes were very expensive, some US$200 per piece.
Thanks for the post! Speaking of comparison to a halide system...Huh? No.. there are plenty of true UV-a UV-B diodes..
Even UV-C
https://www.ebay.com/i/201832362928?chn=ps
UV-A diodes are a bit problematic and need very specific lensing but not expensive.. well unreasonably expensive.
And there are plenty of short lived cheap ones..
http://www.mightexsystems.com/images/Image/Mightex_UV_LED_wavelength_portfolio_July2012_750.jpg
I've learned to never say never..
Lens material:
http://www.opticsforhire.com/blog/2016/4/21/best-materials-for-illumination-optics
quartz glass is still king..
https://www.lumitronix.com/en_gb/le...ia-ncsu276a-uv-smd-led-780mw-365nm-14340.html
Disclaimer:
I think that those who had experiences with T5s and halides see the missing part of the spectrum. I felt when I had my LED system here but didn't know exactly what it was. Specially because there was still a bit if heat coming from it. I'm beginning to understand better what really happens with those LED fixtures.There are UV diodes. There are really three reasons why they are not widespread (yet).
1). They have been expensive in the past - this could have changed
2). They do not last very long - this also could have changed
3). Early iterations of aquarium LEDs have forsaken this spectrum and focused on the visible spectrum. The visible spectrum also would pop PAR meters and stuff to make their products look more powerful... people on this board cannot understand that LUX and PAR meters do not capture all of the usable output, so imagine what a time that AI or EcoTech would have telling people this.
There are some panels out now with real UV (not just 400 or 410nm labeled as UV), but I have not looked in a long while at what they lifecycle for them is. Most what I see is in the 380nm range, but no idea what kind it is, or anything. 360/365 would be a nice addition as well.
I imagine that every unit will have them soon. Without "upgrades" there is no reason to get rid of what you have.
This is one of the missing spectrum that a lot of people get back with T5s because nearly all have some UV, but some more than others.