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Old 06-28-2010, 10:11 AM
Oakminster Oakminster is offline
Join Date: Jun 2006
Location: Surefall Glade, Antonica
Posts: 18,903
Ease of reading red vs blue LED display

About a year ago, my trusty clock radio died. I replaced it with a cheap digital clock that had fairly large numbers in a blue LED display. I hated that damn clock. Had enormous difficulty reading it from across the room. Finally, the buttons on the thing stopped working--whole clock was poorly made, I think. So I replaced it with another clock radio, with much smaller numbers in a red LED display. The red numbers are approximately half the size of the blue ones, yet I can read them easily from across the room, and even while walking down the hall. As far as I can tell, my vision hasn't changed in the last year.

Why would it be so much easier to see the smaller, red LED numbers as opposed to the larger blue LED numbers?

Last edited by Oakminster; 06-28-2010 at 10:11 AM.


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