Light Meter Reading Lux Measurement Chart

Meter 0 0001 phot 0 0929 foot candle 1 phot 1 lumen sq.

Light meter reading lux measurement chart.

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. 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. Lux is a measurement of light intensity commonly referred to as illumination. What makes a lux meter attractive compared to a par meter or quantum light meters used by professionals is that it is much cheaper.

6 2 2 measure the lux at 1 meter height from ground level. In essence lux is the light intensity within a specific area. Measuring units of light level illuminance illuminance is measured in foot candles ftcd fc fcd or lux in the metric si system. The purpose of lux is to provide the number of lumens needed to sufficiently light a given space.

One lux is one lumen per square meter. 1 lux 1 lumen meter 2 1 foot candle ftcd fcd 1 lumen sq. Lighting professionals use a light meter also called an illuminance meter or lux meter to measure the amount of light in a space on a particular work surface. 6 3 1 the lux level measured shall not be less than.

Cm 10000 lux chart of light levels from natural sources lux or illuminance. Light diminishes as it travels by the square of the distance traveled. 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. It measures the amount of light present on a particular surface as measured by the human eye.

6 2 3 record the reading in lux level monitoring record. Earlier it was common with light levels in the range 100 300 lux for normal activities. 6 2 1 hold the lux meter at minimum 5 location. 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.

Lux meters sometimes called light meters measure the intensity of illumination as distinguished by the human eye. Annexure i 6 2 4 the average lux of all readings will be lux level in room. 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. A foot candle is actually one lumen of light density per square foot.

1 lux 1 lumen sq meter 0 0001 phot 0 0929 foot candle ftcd fcd. 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. 400 lux for production. Cm 10000 lumens sq.

While a good par meter can easily cost 1 000 or more you can obtain a lux meter for a. Today the light level is more common in the range 500 1000 lux depending on activity.