Find your
plant's place.
Good light is measured at the plant, not guessed from the window. Record what really happens in your room or balcony and print a private observation sheet.
Your entries stay in this browser page. No account, upload or location tracking.
Use at more than one time of day. This worksheet records observed conditions. It does not diagnose a plant, calculate DLI from lux, or claim that one position suits every species.
An observation, not a verdict.
The flags below identify factors worth checking. They are not species-specific advice or a horticultural light calculation.
A lux reading estimates visible illuminance and is not PPFD or DLI. Phone sensors may be inaccurate. A reading is optional and only useful for consistent relative comparisons unless a properly specified instrument is used. Inspect the position repeatedly and consult plant-specific references.
University of Minnesota Extension: Lighting for indoor plants ↗Read the light field note ↗