Tuttle ha scritto:
Io verificherei bene il tipo di calcolo e i parametri inseriti, perché il valore finale è davvero basso.
Ciao
Solar illumination on horizontal surface at
various solar altitudes above the horizon
Solar altit Illumination
degrees log10 Lux Lux
90.0 5.11 129000
80.0 5.09 122000
70.0 5.06 114000
60.0 5.01 103000
50.0 4.94 87400
45.0 4.89 77800
40.0 4.83 67500
35.0 4.75 56900
30.0 4.67 46300
25.0 4.56 36300
20.0 4.44 27400
15.0 4.28 19200
14.0 4.25 17600
13.0 4.20 15900
12.0 4.16 14300
11.0 4.10 12700
10.0 4.05 11100
The table below shows common illumination levels of natural light sources:
Stellar magnitude Illuminance
Lux
Sun overhead -26.7 130000
Full daylight (not direct sun) -24 to -25 10000-25000
Overcast day -21 1000
Very dark overcast day -19 100
Twilight -16 10
Deep twilight -14 1
1 Candela at 1 meter distance -13.9 1.00
Full Moon overhead -12.5 0.267
Messaggio orinale: https://old.luogocomune.net/site/newbb/viewtopic.php?forum=13&topic_id=970&post_id=148152