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<p>[QUOTE=&quot;John Burgess, post: 4947411, member: 105098&quot;]Nice display of light effects. Are they both the same Kelvin and comparable wattage?</p><p><br /></p><p>I was working this out the other day, it&#039;s not the light per say, it&#039;s the CRI difference, if you take an incandescent, a LED ,and a halogen bulb of comparable kelvin (2700K) all 3 the same color of light output, it still won&#039;t function visually&nbsp; similarly.</p><p>Imagine, the sun rises at approximately 1800 Kelvin and changes from red to orange to yellow and to white as it rises to over 5000 Kelvin at high noon. It then goes back down the scale as it sets. If it went higher than 5000K it would appear as a blue light source.</p><p><br /></p><p>This is flawed example unless you match the light color and wattage (75 watt incandescent, 53W halogen, 14W LED) the only real difference between the 3 bulbs at that point is the CRI, and the incandescent has the best CRI 97-100, followed by the Halogen, then finally the LED has the worst. All are at least 80 and &quot;satisfactory&quot; according to standards. Incandescent CRI is the standard all other light bulbs wish to one day achieve.</p><p><br /></p><p>Apples to apples, as far as the color of the light Kelvin, warm or cool, and output being equal, </p><p>there will still be a washing out effect due to the much lower CRI of the LED. </p><p><br /></p><p>These pictures can be achieved by simply using a incandescent bulb that&#039;s normally 2700K or a bit lower, and an LED bulb that is 5K or higher. you&#039;ll get yellow light on one and white on the other and this will &quot;appear&quot; to be the drastic difference, it is, BUT this isn&#039;t why the hairlines are pronounced or muted.</p><p><br /></p><p>Why is CRI so important in artificial lighting? because our eyes are used to seeing things the best in natural light, when light is &quot;off&quot;, we are &quot;off&quot;. it&#039;s abnormal and the more unnatural it is, the less color it renders, or reflects as true viewing.</p><p>kind of like color blindness in a way, a color blind person will look at that picture and well, I don&#039;t know what they would see, because I&#039;m not color blind, but they wouldn&#039;t see what we see. Ok, lets say that odd lighting in a parking lot full of high or low pressure sodium lights where no colors look &quot;right&quot; at all, that&#039;s LOW CRI.</p><p><br /></p><p>I&#039;d really like to see this again, apples to apples with just the CRI as the difference. I think it loses something knowing that the Kelvins don&#039;t match which is why it goes from yellow to white.[/QUOTE]</p><p><br /></p>

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