coral reefer, Nicely done. I just have a few comments
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Originally Posted by coral reefer Think about this-on a clear sunlite day in the Caribbean, the light is so intense that it is almost impossible to replicate the kelvin of the suns rays to the awesome corals below. |
In actuality the colour temperature is very easily replicated in everything from house hold lighting to camera flashes. Kelvin is a temperature scale but when used to measure light it is very different. The Kelvin rating of light is based on the colour a block of carbon turns at a given temperature. It is not based on the actual temperature of the light. It is purely a reference number.
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Originally Posted by coral reefer the most intense light from the sun happens within the first 3 feet of water. Within the first 15 feet of water the red and orange color of the light spectrum have been filtered out. By 30 feet deep, yellow light has been altered. After 50ft., the green light from the sun has been filtered, thus leaving the blues and purple light in the spectrum from say 440-490nm. Basically, what is being displayed is how fast water reflex sunlight's wavelength. Remember, sunlight has a color temp of 6500-6900k which is a very cool temperature. As you approach the 20000k end of the spectrum(blue)the temperature of the light is hotter(gets higher as the water depth increases). |
It has more to do with the wave length of yellow, red light being very large and blue green light having much narrower wave length. This allows water to absorb yellow/Red faster. PAR (Photosynthetically Available Radiation) Plays a much bigger role in choosing a lamp than colour temperature, but usually 6500-10000K lamps have greater PAR values than that of 14-20K. But this is of course based on the same quality of bulb.
Please don't get me wrong your message is very true and well stated I just though I'd add you what you have started
J