The Ultraviolet Light Block

Name: The Ultraviolet Light Block
Uploaded: 2025-07-01T07:00:40+00:00
Duration: 31 s
Channel: Dr. Charles Mok
Description: Dr. Charles Mok explains how fluorescent and incandescent lights emit UV radiation that LEDs don't. During a surgical mission in Peru, fluorescent lights…

1 Jul 2025 · 1 min

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0:31

Dr. Charles Mok explains how fluorescent and incandescent lights emit UV radiation that LEDs don't. During a surgical mission in Peru, fluorescent lights in the operating room gave the team sunburns and keratitis, a condition that damages the cornea.

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We don't think about the exposure we get to ultraviolet light because we call it sunblock. It actually should be ultraviolet light block. I'm standing here in a building that was built in 2000. It's got fluorescent lights that spew out ultraviolet light. You can get a sunburn from ultraviolet light. We did a surgical mission in Peru a few years ago, and they had fluorescent lights that would not be allowed in America. But we all got sunburns and keratitis of our eyes because there was so much fluorescent, so much ultraviolet light getting off. LED lights don't have that, but fluorescent does. So does natural sunlight. So does incandescent lights. We're exposed to that all the time. We slow down aging with this sunblock.