Kelvin vs. Nanometer
- Thread starter javajo
- Start date
Simply, if you specify the wavelength of light, you are specifying a single, very specific colour, one of the Sodium yellow lines for example. Monochromatic. This is not much use for describing the colour of daylight for example, which is a full spectrum.
It is not however, white, with equal intensity accross the visible range. So, take a bar of iron and heat it to 2000K, and consider the spectrum of its colour, (red end heavy), take the same bar up to 5000K, (daylight like), up to 10,000K (blue end heavy).
This is very simplistic, but maybe gives you the general idea.
Tubes of around 5,000K up to 6,500K give the most natural colouration. They also include most of the frequencies absorbed by chlorophyll, the green photosynthetic pigment in plants, thus are good for plant growth. Many modern tri-phosphor tubes fall into this category, although a lot of special purpose lamps are also available.
It is not however, white, with equal intensity accross the visible range. So, take a bar of iron and heat it to 2000K, and consider the spectrum of its colour, (red end heavy), take the same bar up to 5000K, (daylight like), up to 10,000K (blue end heavy).
This is very simplistic, but maybe gives you the general idea.
Tubes of around 5,000K up to 6,500K give the most natural colouration. They also include most of the frequencies absorbed by chlorophyll, the green photosynthetic pigment in plants, thus are good for plant growth. Many modern tri-phosphor tubes fall into this category, although a lot of special purpose lamps are also available.
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