Light Sensor Meter

A simple light level meter that gives a very accurate (depending on the quality of your device and the sensors in it) and helpful visual aid.

Common Light Levels Outdoor
Condition Illumination
(ftcd) (lux)

Sunlight 10,000 107,527
Full Daylight 1,000 10,752
Overcast Day 100 1,075
Very Dark Day 10 107
Twilight 1 10.8
Deep Twilight .1 1.08
Full Moon .01 .108
Quarter Moon .001 .0108
Starlight .0001 .0011
Overcast Night .00001 .0001


Common and Recommended Light Levels Indoor
Activity Illumination
(lux, lumen/m2)

* Public areas with dark surroundings 20 - 50
* Simple orientation for short visits 50 - 100
* Working areas where visual tasks are
only occasionally performed 100 - 150
* Warehouses, Homes, Theaters, Archives 150
* Easy Office Work, Classes 250
* Normal Office Work, PC Work, Study
Library, Groceries, Show Rooms,
Laboratories 500
* Supermarkets, Mechanical Workshops,
Office Landscapes 750
* Normal Drawing Work, Detailed
Mechanical Workshops, Operation Theatres 1,000
* Detailed Drawing Work, Very Detailed
Mechanical Works 1500 - 2000
* Performance of visual tasks of low
contrast and very small size for
prolonged periods of time 2000 - 5000
* Performance of very prolonged and
exacting visual tasks 5000 - 10000
* Performance of very special visual
tasks of extremely low contrast and
small size 10000 - 20000


If you experience any issues please feel free to contact us with the description of the issue and type of phone you are using and we will do our best to help resolve your issue.
Thank you, have fun and enjoy.