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15.) Higher Kelvin bulbs such as those in the 14k-20k range will cause corals to "color up".
All the scientific research done in this area suggests that Kelvin has no effect on the bright coloration of corals. When it comes to lighting, intesity is the deciding factor on what color you corals are/will be. If you observe your corals getting more colorful after switching to a higher Kelvin bulb it's a result of the change in intesity and the perception of color that comes along with the higher Kelvin and greater blue spectrum.
Conclusion: This one is pretty harmless, but it's one of those beliefs that is perpetuated over and over again on this forum. There are other factors that will help determine coral coloration but all research suggests that the Kelvin of the light source is not one of them.
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