PhotonWrangler
Flashaholic
I had a nasty bruise on the back of my hand recently after accidentally smacking it on something. A day or so later I noticed that it was turning from red to blue-black (normal for bruises). What startled me was how different it looked under the two different LED bulbs in my home office. One of the bulbs makes it look very blue-black, and the other one seems to hide the bruising somewhat.
As the healing process continued and the blue-black areas changed to yellow-green as the hemoglobin broke down, one of the lamps still make my skin look bruised while the other one made it look almost completely healed. As I waved my hand between the two bulbs, the bruise would appear and disappear. It was like a magic trick.
Both of these bulbs are in the 2700k-2900k range. The one that makes it look better is one of the original Philips alien-head lamps (still going strong after several years) while the one that reveals more of the blue-black is a slightly newer Philips "ice cream cone"' bulb. They both produce similar light to my eyes but the CRI is apparently quite different between them, probably the ratio of red to blue wavelengths.
Anyway this seems to point out the importance of CRI for medical examinations. I just didn't realize it made that much of a difference until this happened.
As the healing process continued and the blue-black areas changed to yellow-green as the hemoglobin broke down, one of the lamps still make my skin look bruised while the other one made it look almost completely healed. As I waved my hand between the two bulbs, the bruise would appear and disappear. It was like a magic trick.
Both of these bulbs are in the 2700k-2900k range. The one that makes it look better is one of the original Philips alien-head lamps (still going strong after several years) while the one that reveals more of the blue-black is a slightly newer Philips "ice cream cone"' bulb. They both produce similar light to my eyes but the CRI is apparently quite different between them, probably the ratio of red to blue wavelengths.
Anyway this seems to point out the importance of CRI for medical examinations. I just didn't realize it made that much of a difference until this happened.