What is the light intensity?
Light intensity refers to the strength or amount of light produced by a specific lamp source. It is the measure of the wavelength-weighted power emitted by a light source.
How do you read light intensity?
It is measured in footcandles or lux – it is the amount of light (lumens) falling on a surface (over any given square foot or square meter). Therefore, light intensity is measured in terms of lumens per square foot (footcandles) or lumens per square meter (lux).
Can a lux meter Measure LED light?
Lux meters can detect and measure all white light, especially from the sun or incandescent bulb. Lux meters are unable to accurately pick up LED light as LED lights have a higher blue light wavelength. Additionally, lux meters will not be able to tell the luminosity of blue, red or purple LED lights.
How do I check my lux level?
The lux measurement procedure simply requires positioning a meter’s sensor on the surface or location where you wish to measure the incident light. The sensor should face the light source at a right angle.
What are acceptable lux levels?
Earlier it was common with light levels in the range 100 – 300 lux for normal activities. Today the light level is more common in the range 500 – 1000 lux – depending on activity. For precision and detailed works, the light level may even approach 1500 – 2000 lux.
How many Lux is a 100 watt light bulb?
How many lumens does it take to blind someone permanently?
Eighty lumens is sufficient to cause temporary flash blindness in dark conditions, and 200 lumens can cause temporary blindness in daylight. Visible light is not sufficient to cause permanent blindness, regardless of the intensity.
How many watts is a Lux?
For monochromatic light of this wavelength, the amount of illuminance for a given amount of irradiance is maximum: 683.002 lux per 1 W/m2; the irradiance needed to make 1 lux at this wavelength is about 1.464 mW/m2. Other wavelengths of visible light produce fewer lux per watt-per-meter-squared.