This was with an uncalibrated phone app, so could easily be wildly out. My previous phone maxed out at 50k lux.
The strongest reading did appear to come at an unexpected angle. I wonder whether the protective glass over-screen was somehow focusing light onto the sensor, increasing the reading ?
https://www.extrica.com/article/21667 concludes with: An engineering rule of thumb is 120 lx equals 1 W/m2, or 1 Sun equals 120000 lx. [1 Sun = 1kW/m^2]
At best we got 100W/m^2 from our solar panels in Cambridge (1-2 hour average production) which were supposed to be 14% efficient, which gives about 84k lux.
So, I wont trust the absolute readings from this app. Thanks.
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timeasmymeasure
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Date: 2024-08-12 09:36 am (UTC)The strongest reading did appear to come at an unexpected angle. I wonder whether the protective glass over-screen was somehow focusing light onto the sensor, increasing the reading ?
https://www.extrica.com/article/21667 concludes with:
An engineering rule of thumb is 120 lx equals 1 W/m2, or 1 Sun equals 120000 lx.
[1 Sun = 1kW/m^2]
At best we got 100W/m^2 from our solar panels in Cambridge (1-2 hour average production) which were supposed to be 14% efficient, which gives about 84k lux.
So, I wont trust the absolute readings from this app. Thanks.