Illuminants differ from one another in a number of ways. In this regard, the consumer does not always know what he/she must pay attention to. The
energy consumption, the
light quality , or the
service life must be compared and evaluated.
The following table shows an overview of all commercial light sources – this way you are able to compare all significant criteria at a glance.
Energy consumption rel. to incand. lamp
Service life (operating time 3h/day)
Colour rendering index Ra
LED
15 - 20%
20,000 - 50,000 h
20 - 50 years
Ra 80 - 95
2,700 - 4,000 K
Fluorescent lamps
15%
18,000 h
16 years
Ra 80 - 90
2,700 - 6,000 K
Discharge lamps
15%
6,000 h
5.5 years
Ra 80 - 95
3,000 K
Energy-saving lamps
20%
10,000 h
11 years
Ra 80 - 90
2,700 - 4,000 K
12 V halogen lamps
70%
2,000 - 4,000 h
2 - 4 years
Ra 100
2,900 - 3,000 K
230 V halogen lamps
90%
2,000 - 4,000 h
2 - 4 years
Ra 100
2,900 - 3,000 K
Incandescent lamps
100%
1,000 h
1 year
Ra 100
2,700 K