SARDAR VALLABHBHAI PATEL INSTITUTE OF TECHNOLOGY

1. SARDAR VALLABHBHAI PATEL INSTITUTE OF TECHNOLOGY Information and Technology Department

2. TOPIC: TYPES OF LAMPS PREPARED BY:SIDDHARTH RAJ- 130410116091 JASMITA SHIRKE- 130410116101 MAITHILI CHOKSHI- 130410116008 KRISHNA BHATT-130410116005 GUIDED BY: SAGAR AHIRE

3. TYPES OF LAMPS Plasma Lamp Fluorescent Lamp LED Lamp Safety Lamp

4. Plasma Lamp • Plasma lamp is a clear glass orb filled with a mixture of various noble gases with a high-voltage electrode in the center of the sphere. Plasma filaments extend from the inner electrode to the outer glass insulator, giving the appearance of multiple constant beams of colored light. Plasma globes were most popular as novelty items in the 1980s.

5. Plasma Lamps

6. Hazards of Plasma Lamp Bringing conductive materials or electronic devices close to a plasma globe may cause the glass to become hot. The high voltage radio frequency energy coupled to them from within the globe may cause a mild electric shock, even through a protective plastic casing. The radio frequency field produced by plasma lamps can interfere with the operation of touchpads used on laptop computers, digital audio players, cell phones, and other similar devices. Some types can radiate sufficient radio frequency interference (RFI) to interfere with cordless telephones and Wi-Fi devices several feet away.

7. Applications of Plasma Lamp Plasma lamps are mainly used as curiosities or toys for their unique lighting effects and the "tricks" that can be performed on them by users moving their hands around them. They might also form part of a school's laboratory equipment for demonstration purposes. They are not usually employed for general lighting. However, as of recent years, some novelty stores have begun selling a nightlight plasma lamp that can fit into a standard light socket. Interior of Plasma Ball

8. Fluorescent Lamp A fluorescent lamp or fluorescent tube is a low pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the bulb to fluoresce, producing visible light. A fluorescent lamp converts electrical power into useful light much more efficiently than incandescent lamps. The luminous efficacy of a fluorescent light bulb can exceed 100 lumens per watt, several times the efficacy of an incandescent bulb with comparable light output.

9. Fluorescent Lamp Different ballasts for fluorescent and discharge lamps Fluorescent lamps Top, two compact fluorescent lamps. Bottom, two fluorescent tube lamps. A matchstick, left, is shown for scale.

10. Advantages of Fluorescent Lamps Luminous Efficacy Life Lower luminous Lower Heat

11. Light Emitting Diode Lamp A LED lamp is a light-emitting diode (LED) product that is assembled into a lamp (or light bulb) for use in lighting fixtures. LED lamps have a lifespan and electrical efficiency that is several times better than incandescent lamps, and significantly better than most fluorescent lamps, with some chips able to emit more than 100 lumens per watt.

12. Light Emitting Diode Lamps Computer-led LED lighting allows enhancement of unique qualities of paintings in the National Museum in Warsaw. LED Flashlight replacement bulb (left), with tungsten equivalent (right) LED spotlight using 60 individual diodes for mains voltage power

13. Speciality Uses of LED Lamps White LED lamps have achieved market dominance in applications where high efficiency is important at low power levels. Some of these applications include flashlights, solar-powered garden or walkway lights, and bicycle lights. Monochromatic (colored) LED lamps are now commercially used for traffic signal lamps, where the ability to emit bright monochromatic light is a desired feature, and in strings of holiday lights.

14. Limitations of LED Lamps • Color rendition is not identical to incandescent lamps. A measurement unit called CRI is used to express how the light source's ability to render the eight color sample chips compare to a reference on a scale from 0 to 100.LEDs with CRI below 75 are not recommended for use in indoor lighting.

15. Safety Lamps • A safety lamp is any of several types of lamp that provides illumination in coal mines and is designed to operate in air that may contain coal dust or gases both of which are potentially flammable or explosive. Until the development of effective electric lamps in the early 1900s miners used flame lamps to provide illumination. Open flame lamps could ignite flammable gases which collected in mines, causing explosions and so safety lamps were developed to enclose the flame and prevent it from igniting the surrounding atmosphere.

16. Safety Lamps Modern flame safety lamp used in mines, manufactured by Koehler Miner's safety lamp designed by Mr William Yates c. 1878, published in Dr Ure's Dictionary supplement of 1879 Marsaut lamp (on the right) showing a triple gauze variant

17. Examples of Safety Lamps Davy Lamp Stephenson Lamp Purdy Lamp Improved Clanny Lamp Mueseler Lamp Marsaut Lamp Bainbridge Lamp Landaus Lamp Yates Lamp

18. Principles of Operation Safety lamps have to address the following issues: Provide adequate light Do not trigger explosions Warn of a dangerous atmosphere Fuel - this is the easiest part of the triangle to consider, there is fuel in the form of oil inside the lamp and fuel in the form of firedamp or coal dust outside.

19. Sources • Wikipedia/org/types of lamps • Google/types of lamps

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