How do you use a lux light meter?

One lux is one lumen per square meter. A working example, We have a light source whose total light produced (luminous flux) is 1000 lumens. If we could focus this onto the surface of 1 square metre we would have an illuminance of 1000 lux….How to Measure Light.

What is a lux meter good for?

The CENTER530 is the ideal light meter for basic lighting investigations. With its detachable probe you can use it as a single handed unit, or use it with the sensor away from your body. Its wide measurement range also makes it suitable for measuring outdoor lighting.

How do you read a lux meter?

Test how lux readings change with distance from a fixed light source. For example, stand directly under a ceiling light, hold your phone with the screen facing up, and move the phone up and down. Alternatively hold the phone sideways and aim it toward a floor lamp as you walk closer to and farther away from the lamp.

Are lux meters accurate?

Accuracy: the tolerance of meter readouts; most meters range between ±3-7\%.

How many lux is a light bulb?

The diagram below helps to visualise this more easily. One lux (1 lux) of light is a measure of the light density, equivalent to 1 lumen per square metre (lm / m^2)….Definition of Lux.

How do you calculate lux from Watts?

Page 1

1. Not Confidential – Internal.
2. Theoritical Lux Calculation as requested.
3. Watts to lux calculation formula.
4. Watts to lux calculation with area in square meters.
5. The illuminance Ev in lux (lx) is equal to the power P in watts (W), times the luminous efficacy η
6. Ev(lx) = P(W) × η(lm/W) / A(m2)

How does phone measure lux?

Locate the light sensor on your device. It is usually near the top on the front of the phone (the side with the screen). You can do this by running your fingertip over the surface of the phone while your lux meter app is open. When your finger covers the light sensor the reading should drop.