What is a photometric diagram?

Polar Luminous Intensity Graph: The diagram illustrates the distribution of luminous intensity, in candelas, for the transverse (solid line) and axial (dashed line) planes of the luminaire.

What does a photometric plan show?

A photometric plan (aka photometric analysis, photometric lighting study) is a digital survey of your site with a proposed lighting solution. This light study allows you to view the lighting level at the job-site before construction begins.

What is lighting photometric?

Photometrics gauges how humans perceive light — its coverage area, i.e., where light cuts off and the intensity of light in relation to distance from the light source. In practical terms, photometrics shows whether a lighting plan meets the quantitative lighting requirements for a project.

How do you calculate Photometrics?

Photometric calculation To calculate the quality characteristics, the light distribution of the luminair is measured, i.e. the light intensity (cd/klm) is measured for a number of C and gamma angles. Then the illumination of a theoretical street, illuminated by 5 luminaires, is calculated.

How do you read a photometry report?

How to read a photometric Report?

  1. Type of lighting (Direct vs Indirect).
  2. Symmetry of the distribution (Symmetric or asymmetric).
  3. Type of distribution (Narrow or wide pattern)
  4. Smooth or rounded pattern.
  5. Glare or no glare production.

What is a photometric calculation?

Photometric calculation To calculate the quality characteristics, the light distribution of the luminair is measured, i.e. the light intensity (cd/klm) is measured for a number of C and gamma angles.

What is photometric toolbox?

Photometric Toolbox® is an evaluation program for manufacturers’ luminaire photometry that allows you to create, edit, repair, report and compare luminaire data. This is the cult-users tool you hear about when industry insiders talk about luminaire performance.

What is photometric design data?

Emergency Lighting Photometric Data helps determine the proper illumination levels the fixture provides. The objective when reading these, is for Lighting Designers to determine if an Emergency Light Fixture will meet the specifications required for the electrical project.

How do you convert Candela to Lux?

How to convert luminous intensity in candela (cd) to illuminance in lux (lx). You can calculate lux from candela and distance from light source. You can’t convert candela to lux, since lux and candela do not represent the same quantity.

How is intensity of light measured?

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).