|
Colour temperature |
-
2,500 to 3,000 K |
-
warm colour |
|
Luminous efficacy |
-
10 to 35 lumens per watt |
-
lowest efficacy of all light sources |
|
|
|
-
efficacy increases with lamp size |
|
Lamp life (hours) |
-
1,000 to 4,000 (typical 1,000) |
-
shortest life of all light sources |
|
|
|
-
longer life lamps have lower efficacy |
|
General |
-
first developed and most common lamps |
|
|
Lamp configuration |
-
point source |
|
|
Lamp watts |
- 1
to 1,500 W |
|
|
Lamp lumen |
-
80% to 90% depreciation factor (LLD) |
|
|
Warm-up time |
-
instant |
|
|
Restrike time |
-
instant |
|
|
Lamp cost |
-
low |
|
|
|
-
lowest initial cost |
|
|
|
-
Highest operating cost |
|
|
Main applications |
-
Residential |
|
|
|
-
Merchandising, display lighting |
|
|
Robustness |
-
Susceptible to shock and vibration |
-
Filament is relatively delicate |
|
Energy Efficiency |
-
Utilizes about 10% of energy for light emission, 90% converted to heat. |
|
