Compare windowsills and corners using the same phone, at the same time of day.
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About this tool
How it works
Phone cameras are not calibrated lux meters. This tool reports relative brightness for comparison, not horticultural-grade lux or PPFD.
Example
Measure beside a window, then move to the proposed shelf and compare the relative reading.
Private by default
The calculation or transformation happens in this browser. There is no account, and the values you enter are not sent to Naughty Bear Labs.