This slide is about types of lamp.Different types of lamp & their description are given in this slide. i.e. Plasma Lamp Fluorescent Lamp LED Lamp Safety Lamp

4. • 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.

6. 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.

7. • 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. • Luminous Efficacy
• Life
• Lower luminous
• Lower Heat

10. • 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.

11. Light Emitting Diode Lamps

12. • 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.

13. • 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.

14. • 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.

15. Safety Lamps

16. • Davy Lamp
• Stephenson Lamp
• Purdy Lamp
• Improved Clanny Lamp
• Mueseler Lamp
• Marsaut Lamp
• Bainbridge Lamp
• Landaus Lamp
• Yates Lamp

17. 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.