Luminous Efficacy

  • 709 views
Uploaded on

Efficacy, power and costs of high brightness LEDs have got levels that make them an attractive solution in many lighting system applications. …

Efficacy, power and costs of high brightness LEDs have got levels that make them an attractive solution in many lighting system applications.

The luminous efficacy of a light source is the ratio between the emitted luminous flux and the amount of the absorbed energy to transmit it. It is expressed in lumen/watt (lm/W). The lumen, the measure unit of the luminous flux, is equal to the luminous flux detected in a solid angle of one steradian and emitted towards all directions from a source with a luminous intensity of 1 candle. (the steradian –sr symbol- is the SI unit of solid angle and it is defined as " the solid angle subtended at the center of a sphere of radius r by a portion of the surface of the sphere having an area r ²".

More in: Technology , Business
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
No Downloads

Views

Total Views
709
On Slideshare
0
From Embeds
0
Number of Embeds
0

Actions

Shares
Downloads
26
Comments
0
Likes
1

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. Luminous Efficacy http://dev.emcelettronica.com/print/51770 Your Electronics Open Source (http://dev.emcelettronica.com) Home > Blog > Emanuele's blog > Content Luminous Efficacy By Emanuele Created 16/04/2008 - 10:36 BLOG Diodes by Franco Musiari [ Assipe [1]] Efficacy, power and costs of high brightness LEDs have got levels that make them an attractive solution in many lighting system applications. The luminous efficacy of a light source is the ratio between the emitted luminous flux and the amount of the absorbed energy to transmit it. It is expressed in lumen/watt (lm/W). The lumen, the measure unit of the luminous flux, is equal to the luminous flux detected in a solid angle of one steradian and emitted towards all directions from a source with a lu