Lumen Method DOCX

Title	Lumen Method
Author	K. Movies24Sharek...
Pages	13
File Size	184.3 KB
File Type	DOCX
Total Downloads	487
Total Views	767

Summary

Lumen Method The quantity of light reaching a certain surface is usually the main consideration in designing a lighting system. This quantity of light is specified by illuminance measured in lux, and as this level varies across the working plane, an average figure is used. CIBSE Lighting Guides give...

Description

Lumen Method The quantity of light reaching a certain surface is usually the main consideration in designing a lighting system. This quantity of light is specifed by illuminance measured in lux, and as this level varies across the working plane, an average fgure is used. CIBSE Lighting Guides give values of illuminance that are suitable for various areas. The section - Lighting Levels in these notes also gives illuminance values. The lumen method is used to determine the number of lamps that should be installed for a given area or room. Calculating for the Lumen Method The method is a commonly used technique of lighting design, which is valid, if the light fttings (luminaires) are to be mounted overhead in a regular pattern. The luminous fuu output (lumens) of each lamp needs to be known as well as details of the luminaires and the room surfaces. Usually the illuminance is already specifed e.g. ofce 500 luu, kitchen 300 luu, the designer chooses suitable luminaires and then wishes to know how many are required....