I can surmise you don’t understand Kelvin and few people do. There are 3 temperature scales Fahrenheit, Celsius or Centigrade and Kelvin. Kelvin is the temperature scale used mostly in physics for extreme temperatures.
At the physically impossible-to-reach temperature of zero Kelvin, or minus 459.67 degrees Fahrenheit (minus 273.15 degrees Celsius), atoms would stop moving. As such, nothing can be colder than absolute zero on the Kelvin scale.
Freezing 0 K = -273.15 C = -459.67 F
Boiling 373 K = 100C = 212 F
Equivalent point -40 C = -40 F
In the aquarium lighting world we refer to color in terms of Kelvin.
5500K / 10,000 K aka 10K / 20,000K aka 20K
“Color “yellow / white / blue.
Look at stars some night and you can see what I mean. Unfortunately there isn’t a standard or specific value or wavelength when you buy a 20K colored bulb. It’s just more 20K “blue” than 10K “white “
Now when it comes to coral lighting – light up a 400W metal halide outdoors on a cloudy day. It’s nothing compared to the sun which is 5500K BTW. Most coral sold for hobby is getting much bluer than white light. White light is all the colors of the rainbow but 20 feet down its blue that we accept as 20K. As much as we want to accept LED lighting over metal halide lighting I really miss the rays of light only halides can produce.
Woody
I'm one of your sponsors Seahorse Aquarium Supply
www.seahorse-nw.com
I have an information only website and don't sell online
At the physically impossible-to-reach temperature of zero Kelvin, or minus 459.67 degrees Fahrenheit (minus 273.15 degrees Celsius), atoms would stop moving. As such, nothing can be colder than absolute zero on the Kelvin scale.
Freezing 0 K = -273.15 C = -459.67 F
Boiling 373 K = 100C = 212 F
Equivalent point -40 C = -40 F
In the aquarium lighting world we refer to color in terms of Kelvin.
5500K / 10,000 K aka 10K / 20,000K aka 20K
“Color “yellow / white / blue.
Look at stars some night and you can see what I mean. Unfortunately there isn’t a standard or specific value or wavelength when you buy a 20K colored bulb. It’s just more 20K “blue” than 10K “white “
Now when it comes to coral lighting – light up a 400W metal halide outdoors on a cloudy day. It’s nothing compared to the sun which is 5500K BTW. Most coral sold for hobby is getting much bluer than white light. White light is all the colors of the rainbow but 20 feet down its blue that we accept as 20K. As much as we want to accept LED lighting over metal halide lighting I really miss the rays of light only halides can produce.
Woody
I'm one of your sponsors Seahorse Aquarium Supply
www.seahorse-nw.com
I have an information only website and don't sell online
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