Light Meter Reading Lux Measurement Chart

Lux meters sometimes called light meters measure the intensity of illumination as distinguished by the human eye.

Light meter reading lux measurement chart. While a good par meter can easily cost 1 000 or more you can obtain a lux meter for a. 6 2 1 hold the lux meter at minimum 5 location. Cm 10000 lux chart of light levels from natural sources lux or illuminance. Earlier it was common with light levels in the range 100 300 lux for normal activities.

6 3 1 the lux level measured shall not be less than. Annexure i 6 2 4 the average lux of all readings will be lux level in room. Rather than measuring the total quantity of light produced by the light source a lux meter will measure the quantity of light distributed over or at a particular area at a specified distance from the light source. This value does not correlate to an objective value of energy radiated or reflected as different wavelengths within the visible spectrum are perceived with varying sensitivity by the eye and lux meters evaluate light intensity in consideration of this variable.

1 lux 1 lumen sq meter 0 0001 phot 0 0929 foot candle ftcd fcd. Lux is a measurement of light intensity commonly referred to as illumination. According en 12464 light and lighting lighting of workplaces indoor work places the minimum illuminance is 50 lx for walls and 30 lx for ceilings. It measures the amount of light present on a particular surface as measured by the human eye.

A lux meter is a relatively simple device with which you can measure the amount of light lux lumens m in your grow room. 400 lux for production. Ft 10 752 lux 1 lux 1 lumen sq. A foot candle is actually one lumen of light density per square foot.

For example if one is attempting to obtain a suitable light level for an office then the ideal position is to measure the light at. Your light meter whether reading in foot candles or lux will tell you how much light is in the immediate area that the sensor is in. The light meter has a sensor that measures the light falling on it and provides the user with a measurable illuminance reading. The purpose of lux is to provide the number of lumens needed to sufficiently light a given space.

6 2 2 measure the lux at 1 meter height from ground level. One lux is one lumen per square meter. Meter 0 0001 phot 0 0929 foot candle 1 phot 1 lumen sq. 6 2 3 record the reading in lux level monitoring record.

What makes a lux meter attractive compared to a par meter or quantum light meters used by professionals is that it is much cheaper. Today the light level is more common in the range 500 1000 lux depending on activity. Measuring units of light level illuminance illuminance is measured in foot candles ftcd fc fcd or lux in the metric si system. Footcandle meters measure how much light is in 1sq ft around the sensor lux meters measure how much light is in 1sq m around the sensor.

In essence lux is the light intensity within a specific area. Cm 10000 lumens sq.