Why most blue light glasses miss the mark

Preview text: It comes down to a single wavelength.

Felix GrayMonday, Nov 9, 2026 at 7:28 PM EasternKlaviyo
Felix GrayWhy most blue light glasses miss the mark
Subject
Why most blue light glasses miss the mark
Preview text
It comes down to a single wavelength.
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hello@send.felixgray.com
Sent
Mon Nov 9, 2026, 7:28 PM ET
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felixgray.com
Size
44 KB
Images
9
Links
12, 4 of them buttons
Subject length
42 characters

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Sent in the 7 PM hour, which holds 6% of its emails; 23% arrive in the 11 AM hour. The subject is 42 characters; its average is 37.

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