Loading...
 

Light source lifetime

A flourescent lightbulb is a worthwhile investment in the long run, especially since has a longer lifetime

lightlife.gif
Fig. 1 Light source lifetime (Jacobsen 2002 p 121). Shorter lifetimes increase
exchange costs. Comparatively, an LED source lights 30,000 - 50,000 hours.


Lighting optimization

  • Optimize light source and fixture. Substitute incandescent lamps with compact flourescent or LED lights.

  • Adjust to need. Ambient or spot lighting, use of motion sensors.

  • Exploit natural daylight. Incorporate daylight using light-sensitive sensors.


Table 1. Energy classes and lifetime (Source: boliglys.dk)

Light source Energy class Lifetime in hours Adjustable light Value for money
Incandescent E-G 1.000 ja *
Low voltage halogen C-D 2 000 - 5 000 ja **
230 v halogen D-E 1 500 - 3 000 ja *
Compact flourescent bulb A-B 6 000 - 15 000 nej ****
Compact flourescent tube A-B 8 000 - 20 000 not usually ****
Flourescent tube A-B 6 000 - 20 000 not usually *****


Created by tanja.groth. Last Modification: Wednesday 31 March 2010 13:54:27 CEST by tanja.groth.