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TYPES OF LAMPS 
Suhail TP 
MES Collage of Engineering
Light sources 
• Incandescent lamp 
• Discharge lamp 
– Florescent lamp 
– Sodium lamp 
– High pressure mercury vapour lam...
OLD TYPES OF KEROSEN LAMPS
INCANDESCENT LAMP 
• HOT WIRE – FILAMENT 
SEALED IN A GLASS JAR 
(BULB) 
• ELECTRIC CURRENT PASS 
THROUGH THE WIRE HEATS 
...
• Inside gas is argon with 
nitrogen. 
• At the center of the lamp is a 
tungsten filament. 
• Electricity heats this fila...
Parts 
1. GLASS BULB 
2. VACUUM OR GAS 
FILLED 
3. WIRE/FILAMENT 
4. 5. LEAD-IN WIRES 
6. SUPPORT WIRES 
7. NECK 
8. 11. E...
Pros and Cons 
ADVANTAGES: 
1. LESS EXPENSIVE 
2. EASIER TO DIM WITH 
RHEOSTATS 
3. WARMER COLOR THAN 
FLUORESCENT AND 
TH...
Discharge lamps 
• Light is produced by 
passage of an electric 
current through a vapor 
or gas, rather than 
through a t...
FLUORESCENT LAMP
FLUORESCENT LAMP 
• Inside bulb is coated with florescent powder 
• Oxide coated tungsten filament is used as 
electrodes ...
• ADVANTAGES: 
•Heat is relatively low 
•Energy efficient 
•Range from low grade to 
high grade 
•Long lamp life 
•Usually...
Sodium Lamp 
• gas-discharge lamp that uses sodium in an 
excited state to produce light 
• Efficency is 75 lumens/watt 
•...
Cont.. 
• Discharge will not start at low 
voltage 
• Leak transformer produce 
starting voltage of about 400V 
• First ne...
High pressure mercury vapour lamp 
• Inner gas used is Argon 
and mercury 
• Efficiency 40 lumen/watt 
• Inner tube have t...
Artificial Light Sources 
• Incandescent Lamps 
• Fluorescent Lamps 
• High – Intensity Discharge Lamps 
• Mercury Lamps 
...
Lamp efficiency & efficacy 
• Efficacy for a light source is how well it turns 
input power into the desired output, which...
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Types of Lamps

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Brief discussion about difeerent type of lamps

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Types of Lamps

  1. 1. TYPES OF LAMPS Suhail TP MES Collage of Engineering
  2. 2. Light sources • Incandescent lamp • Discharge lamp – Florescent lamp – Sodium lamp – High pressure mercury vapour lamp
  3. 3. OLD TYPES OF KEROSEN LAMPS
  4. 4. INCANDESCENT LAMP • HOT WIRE – FILAMENT SEALED IN A GLASS JAR (BULB) • ELECTRIC CURRENT PASS THROUGH THE WIRE HEATS IT TO INCADESCENCE, AND THE WIRE EMITS LIGHT. USE STANDARD VOLTAGE CIRCUIT.
  5. 5. • Inside gas is argon with nitrogen. • At the center of the lamp is a tungsten filament. • Electricity heats this filament up to about 2,500 degrees Celsius. • Light output is 15 lumens/watt • Operating life 1000 hour • Efficency increased by using – Coiled filament – Coiled coil filament
  6. 6. Parts 1. GLASS BULB 2. VACUUM OR GAS FILLED 3. WIRE/FILAMENT 4. 5. LEAD-IN WIRES 6. SUPPORT WIRES 7. NECK 8. 11. ELECTRIC FUSE 9. BASE
  7. 7. Pros and Cons ADVANTAGES: 1. LESS EXPENSIVE 2. EASIER TO DIM WITH RHEOSTATS 3. WARMER COLOR THAN FLUORESCENT AND THUNGSTEN-HALOGEN LAMPS 4. LIGHT OUTPUT IS RELATIVELY HIGH 5. CAN BE DIMMED DISADVANTAGES: 1. ENERGY INEFFICIENT 2. SHORT LAMP LIFE TIME 3. WARM SOURCE
  8. 8. Discharge lamps • Light is produced by passage of an electric current through a vapor or gas, rather than through a tungsten wire as in incandescent lamp.
  9. 9. FLUORESCENT LAMP
  10. 10. FLUORESCENT LAMP • Inside bulb is coated with florescent powder • Oxide coated tungsten filament is used as electrodes • Light output is 70 lumen/watt • Average life is 7500 hours
  11. 11. • ADVANTAGES: •Heat is relatively low •Energy efficient •Range from low grade to high grade •Long lamp life •Usually Cool source • DISADVANTAGE: •Color temperature •Require ballast: preheat, instant-start, rapid-start •Requires controlling elements for glare control
  12. 12. Sodium Lamp • gas-discharge lamp that uses sodium in an excited state to produce light • Efficency is 75 lumens/watt • Average life 60000 hours
  13. 13. Cont.. • Discharge will not start at low voltage • Leak transformer produce starting voltage of about 400V • First neon gas will discharge after sodium vaporises and discharge continues • Pf is too low(0.3) to correct capacitor is used
  14. 14. High pressure mercury vapour lamp • Inner gas used is Argon and mercury • Efficiency 40 lumen/watt • Inner tube have two main electrodes and an auxiliary electrode
  15. 15. Artificial Light Sources • Incandescent Lamps • Fluorescent Lamps • High – Intensity Discharge Lamps • Mercury Lamps • Metal Halide Lamps • High Pressure Sodium Lamps • Low Pressure Sodium Lamps • Electrodeless Lamps • Compact arc xenon &Mercury Lamps • Electroluminescent Lamps • Light Emitting Diodes (LED) • Carbon arc Lamps • Gaslights
  16. 16. Lamp efficiency & efficacy • Efficacy for a light source is how well it turns input power into the desired output, which is lumens • Efficiency is the actual percentage of power in which comes out as photons.

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