The best way to interpret a spectrum curve is to imagine turning it upside down and that the outline of the curve is the outline of a bucket. The bucket holds colored water. The color of the water is based on the wavelengths.Hello, i know that plant can grow with any light, bulb i'd like to know what kind of color is that light ? thx
View attachment 175584
* MIXING LIST
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myData mystery.txt [130°] x1
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* SIMULATION DATA
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Luminous flux : 500 lm
Radiant flux : 1,360 mW
PPF : 6.1 umol/s
TCP : 3970 K
CRI : 82
λp : 544 nm
Color : #FFB47B
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* PERFORMANCE @ 60cm
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Irradiance : 0.3 W/m²/s
Illuminance : 96.1 lx
PPFD : 1.2 umol/m²/s
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by SPECTRA 1.0β @ 1.023world
SPECTRA
SPECTRA can perform the optical simulation of many required for coral breeding. SPECTRAはサンゴ飼育に必要な多くの光学シミュレーションを行う事が可能です。spectra.1023world.net
Just a point that should be mentioned regarding the above color graph.Amazing tips, thanks so much, you were right, i got the light today, lot of yellow and green in it =)
Yes.i know that any bulb can grow plant, but i've read that lower than 4000K caused certain types of algae is that another myth ?
Yes. Its really important to realize the truth about light bulbs. Only use bulbs that make the plants and fish look pretty.can i go lower than 4000 ?
damn the industry is so f*cked up, that's why i prefer a 6500k over another 6500k i thought it was in my head "it is actually =)"Yes.
Yes. Its really important to realize the truth about light bulbs. Only use bulbs that make the plants and fish look pretty.
If you insist on using bulbs based on some urban myth about Kelvin temperatures you may wind up using bulbs that make the tank look ugly - and that's just not enjoyable at all. Kelvin ratings are all simply marketing devices. You can buy 5 bulbs with the same Kelvin rating and they will all look differently. Consider therefore that these ratings from different manufacturers should be thought of in the same way you think about model numbers of cars or washing machines.
Combine different color bulbs to achieve the visual artistic rendering that you desire and forget about all the technobabble.
Have a look at the sticky in this section for a visual reference=> Cheap HO T5 fluorescent tubes - Update with photos
Cheers,
Well that's a very difficult question because each fixture is built a little differently and the angle that the reflector is positioned differs. So the light can be made to cast slightly more adrift of vertical. I've not experienced the condition you describe. If I have a blue light in the front and an orange light in the back I see more orange in the back and blue in the front. You may be seeing reflections of each colors based on the objects in the tank. The light also exits the bulb in the shape of a cone and at some depth the two cones will intersect causing blending. The water bends each color a little differently and so does the glass. So you may be seeing composite colors and your brain will filter out blues and reds more strongly than oranges, yellows and greens.damn the industry is so f*cked up, that's why i prefer a 6500k over another 6500k i thought it was in my head "it is actually =)"
another question if i may, I have an odyssea t5 fixtures with parabolic reflector, it may be a dumb question though, is that normal that the light color seems to change if i switch the tube position ? what if i make space between them because now there is 3 cm between them ?
lets say that i have 6500k in front and 4000 in back, on my fixture if i want the 6500k to appear more on the front of the aquarium i need to place it in the back i think that's because of the parabolic reflector right ?
thanks yes bulb is so cheap, 2$... should i take CRI seriously or is just another trap ?Well that's a very difficult question because each fixture is built a little differently and the angle that the reflector is positioned differs. So the light can be made to cast slightly more adrift of vertical. I've not experienced the condition you describe. If I have a blue light in the front and an orange light in the back I see more orange in the back and blue in the front. You may be seeing reflections of each colors based on the objects in the tank. The light also exits the bulb in the shape of a cone and at some depth the two cones will intersect causing blending. The water bends each color a little differently and so does the glass. So you may be seeing composite colors and your brain will filter out blues and reds more strongly than oranges, yellows and greens.
At the end of the day you just need to place the bulbs in a position that you find most pleasing. Also, try different bulbs when you can buy them cheaply. I'm sure you will find combinations that you like if you experiment a bit. This is really part of the fun.
Cheers,
Well CRI is really for your benefit.thanks yes bulb is so cheap, 2$... should i take CRI seriously or is just another trap ?
@oreo57 do you work in print/photograghy industry or embedded vision?Just a point that should be mentioned regarding the above color graph.
As you may notice the shadowy grey area is the curve used to define the CRI standard used.
CRI is a pretty flawed metric but it will give you a base understanding of how accurate color are to a certain standard.
In the above the CRI calculation is based on a tungsten light, thus the smooth grey slope in the background.
Compared to using the "daylight" standard (D50, D65, or "C".. don't ask) the color fidelity will be lower in this case.. to about 70.
Might as well go full geek here..an interesting historical perspective:
And a rough idea of how CCT (K) affects colors:
Also keep in mind Lumens/watt is not PAR/watt.
Lumens for you, PAR for plants.
I've dabbled in photography and have done work in graphic arts...@oreo57 do you work in print/photograghy industry or embedded vision?
I got a chuckle when you started talking about D50s
As oreo57 mentions, it is really only valuable as regards photography. It is not really something that we need to worry about. I never consider CRI or any other parameter of light bulbs other than turning them on over the tank and determining for myself whether I like the effects or not. As I mentioned previously, the bulb is nothing more than a paint brush.thanks yes bulb is so cheap, 2$... should i take CRI seriously or is just another trap ?
...that emits light and enables photosynthesis to occur. It also acts as the catalyst in the photoreduction of iron, etc. For anyone interested in reading further, you may want to take a look at the work of McCree, Govindjee, Emerson, Bruce Bugbee and Diana Walstad, to name a few.As I mentioned previously, the bulb is nothing more than a paint brush.
Well CRI is really for your benefit.