I bought and tested this little Budget Lux Meter, and it simple, fast and works fine, no problems, just take off the sensors light cover protection. Add the 9volt battery in the pack and off you go.
I use it for Daylight Photography copying my paintings, measuring light bulbs real light intensity.
p.s. My son took it to his summer science class on myconos island to demonstrate light measurements indoor and outdoor and a day trip to Delos Aegean.
Illuminance Examples range
This model does not read the below 4 examples(you don't really need it)
0.0004 lux Total starlight, overcast sky
0.002 lux Moonless clear night sky with airglow
0.01 lux Quarter moon
0.27 lux Full moon on a clear night
Mini Digital Light Lux Meter - Sinometer LX-1010B Range
1 lux Full moon overhead at tropical latitudes
3.4 lux Dark limit of civil twilight under a clear sky
50 lux Family living room
80 lux Hallway/toilet
100 lux Very dark overcast day
320-500 lux Office lighting
400 lux Sunrise or sunset on a clear day.
1,000 lux Overcast day; typical TV studio lighting
10,000-20,000 lux Full daylight (not direct sun)
does not read (you don't need it)
32,000-130,000 lux Direct sunlight