Table of Contents
Electric Lamps
An electric lamp is a device that can generate artificial light by consuming electric energy.
Filament lamps
Filament word is related to wire and by passing current through a wire, heat is produce which raises its temperature. At low temperature only heat is produce. At high temperatures, light is also produced. Filament lamps are also called incandescent lamps.
Fluorescent Tubes
A fluorescent tube is a low-pressure mercury-vapuor gas-discharge lamp that uses fluorescence to produce visible light.
Comparison between Filament lamps and Fluorescent tubes
| Sr. No. | Filament lamps | Fluorescent tubes |
|---|---|---|
| 1. | It works on the principle of incandescence where a high resistance filament is heated until it radiates visible light. | It works by ion-sing a gas that emits protons. |
| 2. | Its initial cost is low. | Its initial cost is high. |
| 3. | It gives yellow light which is not appealing to eyes. | It gives day light which is pleasant. |
| 4. | It works on AC as well as DC power supply. | For change in supply needs additional accessories. |
| 5. | Filament lamps has more brightness. | In case of Fluorescent tubes they gives less brightness. |
| 6. | Maintenance cost is more. | Maintenance cost is less. |
| 7. | Efficiency of coloured lamp is poor because colour glass is used. | Efficiency is high as it uses fluorescent tubes. |
| 8. | Its life is less i.e. about 1000 working hours. | It has longer life i.e. about 6000 working hours. |
| 9. | its working temperature is high. | Its working temperature is low. |
| 10. | Heat radiation is also present. | heat radiation are not present. |
| 11. | The output reduces with time. | The output reduces more rapid with time. |
| 12. | The luminous efficiency increases with applied voltage. | The efficiency increases with length of tube and wattage. |
| 13. | Its lumen output is 10 lumen per watt. | Its lumen output is more 40 lumen per watt. |
| 14. | They are mostly used inn industrial, street light etc. | They are used in commercial lighting, industrial lighting, classroom lighting etc. |
| 15. | They consume more electricity. | They consume less electricity, for the same ratings. |
