Incandescent lighting
General
Break during switch-on
Question
Why does a general incandescent / tungsten halogen lamp mostly break during a switch-on?
Answer
- Service life of incandescent and tungsten halogen lamps is depending on operating energy which partly burns off the filament.
- There are also variances in structure from production.
Thinner parts of the filament cause an energy-jam which high resistance and let the wire melt easily. An incandescent / tungsten halogen lamp dies, when high income energy is shot through a cold, blind spotted filament.
Continuous current
Question
Is it possible to use incandescent lams on continuous current ( dc-voltage )?
Answer
Yes, it is possible.
Direct current influences the filament's surface structure and might so shorten service life.
Krypton-filled lamps
Question
What's the difference between a krypton-filled and a general incandescent lamp?
Answer
- 10% more of light when lamps are filled with krypton
- Lamps filled with precious gas krypton can be built smaller and therefore used space saving.
The new generation of Superlux Krypton has silicate bulbs Which prove an even-out, glare-free distribution of light.
Security
Question
What's the regarding standard of security for incandescent lamps?
Answer
The international norm is IEC 432.
The European version is EN 60432.
Service life
Question
Does it affect service life when you frequently switch incandescent lamps?
Answer
Incandescent lamps are used in traffic lights which are switched frequently.
In opposite to fluorescent lamps service life of incandescent lamps is not depending on frequent switching operation but the operating energy which partly burns off the filament.
Standard
Question
What's the standard OSRAM lamps are built and tested by?
Answer
The international norm is IEC 64.
The European version is EN 60064.
Temperature
Question
Is it possible to use incandescent lamps at low temperatures down to -90° Celsius?
Answer
Yes, it is. But please note that density is not guaranteed for differently contracting materials of base and bulb.
Low temperatures so can be responsible for less service life and luminous efficacy.