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A comment on Morning exposure to deep red light improves declining eyesight. Parent comment

Re:Morning exposure to deep red light improves declining eye... by scotty79 on Wednesday February 01, 2023 @09:52AM (#34611219)
To get ~650nm you can just put #FF0000 on phone screen.
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Re:Morning exposure to deep red light improves declining eye... by voidee on Wednesday February 01, 2023 @08:31PM (#34620828)
Curious if anyone has instrumentation to measure wavelengths for something like this. For instance, I have a 60” TV. What output would a #FF0000 image produce at full brightness?
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