Different Type of LampsGuided by- Designed by-Ghanshyam Sir(E.T) Digant Goradia

(130080116010)

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Contents• History• Different types of lamps with details

Incandescent lamp Fluorescent lamp Compact fluorescent lamp High-Intensity Discharge lamp Low-pressure Sodium lamp High-pressure Sodium lamp Light Emitting Diodes(LED)

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History• The first incandescent lamp was invented by Thomas Alva Edison

and Joseph Swan in nineteenth century.

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Incandescent lamp• Produce heat and brightness with help of filament named Tungsten.• When current is passing through this filament, it produces light.• The hot filament is protected from oxidation with glass which is filled

with gas.• Capacity~700 to 1000 hours• Temperature reaches at about  2200°C.

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Different shapes and types of incandescent bulb

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Halogen lamps• High intensity / long life globes are called tungsten halogen or quartz

halogen.• These lamps are filled with a halogen gas, usually Krypton.• Halogen bulbs are much brighter than incandescent,

and are much more energy efficient for the amount of light produced.

• Halogen headlamps are used in many automobiles.

• Capacity~ two or three times more than Incandescent lamps.

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Different design of Halogen lamps

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Fluorescent lamps• The most common application of this technology is in tubular

fluorescent lamps.• The main benefit of a fluorescent bulb is its long life.• Fluorescent bulbs are very efficient and produce little heat.• Capacity~ between 10000 and 20000 hours.

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Working of Fluorescent lamps• Fluorescent bulbs are filled with argon gas and when electricity is

passed through, a small amount of mercury in the tube produces ultraviolet radiation which in turn causes the phosphorous coating of the tube to give off light. 

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Different Design of Fluorescent lamps

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Compact Fluorescent Lamps• A Compact Fluorescent Lamp (CFL) has the characteristics and

advantages of linear fluorescent lamps but its compact size is achieved by folding the discharge path, retaining high efficacy.

• A 20-25 watt CFL is approximately equivalent to a 100 watt incandescent bulb.

• Working principle is same as fluorescent lamps.• Capacity up to 10000 hours.

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Different Designs of CFL(s)

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High-Intensity Discharge Lamps• The inner tube is filled with various metals and when the metals heat

to the point of evaporation, the bulb produces light. • At high pressure, the mercury discharge is mainly blue and green

radiation.• HID lamps are used to light sports fields, parking lots and roadways.• All high-pressure mercury lamps take time to reach full output.• Capacity~ 20000 hours

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Different Designs of HID lamps

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Low-pressure Sodium lamp•  LPS lamps produce light through a very similar process as a

fluorescent.• They emit a very yellow light and require a ballast like a fluorescent

bulb.• LPS lamps are used when the highest efficiency light is needed. • Most LPS lamps are used for driveways,

parking lots and pathways.(reason: there is no need color at these

place.)

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High-pressure Sodium lamp• High-pressure sodium (HPS) lamps are smaller and contain additional

elements such as mercury.• It produces a dark pink glow when first struck, and an intense pinkish

orange light when warmed.• As the sodium pressure is increased, the

radiation becomes a broad band around the yellow peak, and the appearance is pinkish orange.

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LED (Light Emitting Diodes)• LED bulbs are the light of the future. • They do not have a filament and can give off nearly with different

lights.• They consume the least amount of electricity and produce the least

amount of heat.• LED bulbs have a very long life.so it’s the next

future.• LED bulbs can come in a wide variety of colors and

can be used when colored accent lighting is needed.

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Different Designs of LED

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