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?


David

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