Table PDFLux Meter Reading Log Table

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Reading log item	What to capture	Why it changes the result	Boundary
Assessed plane	Floor path, desktop, bench, shelf face, wall or other named surface.	A reading has meaning only when the assessed surface is clear.	Do not compare a floor reading with a bench or desk target.
Meter position	Height, grid point, distance from walls and normal task position.	Small changes can alter the reading when beams, windows or shadows are nearby.	A single bright point does not describe the whole room.
Operating condition	Which fittings are on, dimming level, daylight condition and time of reading.	Measured illuminance changes with controls and daylight contribution.	Note the condition before comparing with a maintained estimate.
Surface and obstruction notes	Dark finishes, benches, partitions, racking, screens or temporary items.	Local reflectance and shadows can explain low or uneven readings.	Moveable items can make repeat readings hard to compare.
Maintenance condition	Cleanliness, failed lamps, aged diffusers, dust or changed fittings.	The measured value may be lower than the clean-installation expectation.	Do not treat a dirty-room reading as a design value.
Comparison basis	Target, estimate, brief value or previous measurement being compared.	The result should be read against the same plane and same operating condition.	A public table cannot confirm a formal project outcome.

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