Depends also to a large part on what background they
are mounted on. Possibly a dull black panel without
any reflections would be the best.

Jan-Erik.

David Strickland wrote:
>I'm working on a clock design using some LEDs, and have no real idea
>what range of mcd (milli-candela) I need to use for it to be visible
>during the day.
>
>The 7-segment and matrix setups I looked at so far ranged from 4.8 mcd
>for a green 5x7 matrix, to 8 for a green 7segment, to 20 for a red 7
>segment.  Are these remotely bright enough to see across a sunlit room?

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