designed some business cards that only show my info when you're in the sun.
DO NOT contact me unless you are OUT OF OFFICE 😎
DO NOT contact me unless you are OUT OF OFFICE 😎
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Does it actually distinguish artificial light from sunlight, or is it just based on intensity?
Would it work in England on a gloomy, grey winter's day? In the late afternoon?
It does still work on a cloudy day, just takes longer to saturate/doesn't get quite as dark.