role of led's in energy conservation.

2. 1. Introduction
2. different kind of lights
3. energy efficiency and
environmental impact
4.why led’s
5.indian remedies
6.case for conservation
7. conclusion

3. The less efficient the light,and the shorter
it’s life,the more beneficial on LED lighting
upgrade will be.

4. Although the energy efficiency of solid
state light has been documented ,the
most efficient way to power the lighting
has been subject of debate……
Real concerns over, changing to
which sort of light???
What happens then?

5. INCANDESCENT BULBS
• An incandescent bulb is an
electric light that emits light
with a filament wire heated
to a high temperature until
it glows by consuming
electrical energy.
• The incandescent bulb must
be the earliest electric bulb
in human history; however,
energy experts claim that
the incandescent bulb
should be replaced by other
more energy efficient bulbs
and become a thing of the
past.

6. CFL BULBS
• CFL (compact fluorescent
lamp) is a fluorescent
lamp, using a tube curved
or folded to fit into the
base of the bulb which
has a compact electronic
ballast in it.
Philips® Tornado Spiral energy saving bulb

7. LED BULBS
• “LED” is the abbreviation of
“light-emitting diode”. It is a
semiconductor light source
which could emit light when
a current moves through it.
• An LED bulb is a lighting bulb
that uses an LED chip to
convert electronic energy
into light.
Lighting Ever® E27 10W LED Bulb

8. ENERGY EFFICIENCY
LED Bulbs
(Lighting Ever® E27 10W LED
Bulb )
CFL Bulbs
(Philips® Tornado Spiral
energy saving bulb)
Incandescent
Bulbs
Lifespan 50000 hours 8000 hours 1200 hours
Luminous efficiency 81 lm/w 62 lm/w 13.5 lm/w
Watts of electricity used
per hour
10 watts 12watts 60 watts

9. ENVIRONMENTAL IMPACT
Environmental
Impact
LED Bulbs
(Lighting Ever® E27 10W LED
Bulb )
CFL Bulbs
(Philips® Tornado Spiral energy
saving bulb)
Incandescent Bulbs
Contains the TOXIC
Mercury
No Yes No
RoHS Compliant Yes No
(Because of the containing
of Mercury)
Yes

10. LED light bulb example
Table 1: Sample Data Sheet of an A19
LED light bulb [4]
*Lumens/watt
calculations
*luminous flux/
power
consumption
•800lm/10watt
=80 lumens/wt

11. HOW LED CONTRIBUTE TO ENERGY
CONSERVATION?
* Larger operational life, higher energy efficiency
*Tiny size for small form factor fixtures.
(50,000hours of operational life for an LED lamp is far
longer than the typical 1000 to 2000 hrs for
incandescent lamps and 5000 to 10k hrs for Cfl’s.)
More efficient: More light per unit of energy than
incandescent bulbs
80-100 lm/W for LED bulbs, compared to only 10-17
lm/W for incandescent. [5]
Cool: Incandescent light sources can burn very hot, but
a LED light source gives off little thermal heat. [6]
Resistant to breakage: Rather than being made of glass
and thin wires, LEDs are solid state devices and are far
less fragile than an incandescent bulb or fluorescent

12. THE COLOR OF LED’S
 LEDs, due to the materials
available and the limited
number of energy gaps, only
give off light in certain
wavelengths; they do not
give off white light naturally.
 Two different methods are
used to generate white light
 RGB system: Mix Red,
blue, and green LEDs
together to create white
light
 Phosphor system: Coat
LEDs in a phosphor that
shifts the color into the
white spectrum.

13. LED LIGHTS
• Led lights are considered as the best power
efficient technology.
• The inventors of the LED lights received the Nobel
Prize for Physics for the invention of LED lights.
• In our daily life the LED’s have revolutionized the
term electricity with the presence in almost every
electrical equipment.
•The LED is used as LED TV’s, for LED home
lighting systems, for street lights, in automobiles ,in
small devices for notifications, in mobile phones, and
in many more.

14. The colour appearance of a light source is measured in terms of temperature
(Kelvin). The figure above shows pavement cracks by the source from the sodium
vapour light.

15. The above picture shows clearly the
colours, more brightness, and
clarity. Even cracks in the pavement
are clearly visible. In contrast, HPS
light does not show much clarity in
terms of colours and cracks
visibility.

16. light
electricity
Heat emission(very
high) Heat emission(very low) High
light
energy

17. 1879
Edison light
bulb
1901
fluorosce
nt
1919
Sodium
Vapour
lamp
1960
Metal
halide
1970
High
pressure
sodium
1985
Compact
fluoroscent
1995
First led
used for
general
lighting
2005
White led lamps
demonstrates
fluoroscent
efficiency(70lm/w
t)
2009
Productive
white led
lamp exceeds
1000lm/wt

18. USES OF LED LIGHTS
In automobiles , the daytime running LED’s
are used
The LED’s used in fashion wear clothes.
The notification light in wireless controller
used in gaming consoles.
The LED lighting system used in homes for
decorations.

19. You take a note that the Nobel Prize for Physics in 2014
went to the inventors of the (blue) LED?
*Recently India’s energy minister, Piyush
Goyal, announced the country’s intention to replace all its
conventional streetlights with LED ones, with the
underlying logic being that conserving power is more
economical than producing more.
*Reportedly, India has 35 million street lights which
generate a total demand of 3,400 MW. With LED, this can
be brought down to 1400mw, saving 9000mn kw/h of
electricity annually, worth over $850 mn in the process.
To put this into perspective, the electricity deficit in india
during 2014-15 was 38,138mn kwh and 7000mw.

20. *The task of operating and maintaining the street lights falls under the
jurisdiction of Urban Local Bodies (ULB), or municipalities. As most of the ULBs
were not in a position to bear the high initial capital cost by themselves, four
central government power utilities joined hands to set up a company Energy
Efficiency Services Limited (EESL).
*On a side note, apart from efficient lighting, EESL will also operate as a full-
fledged Energy Service Company (ESCO). The company has been making
profits consistently since its formation, without any aid from the government.
Under the service model chosen, the ULBs do not have to make any upfront
investments for installing the LED street lights, as EESL does it for them. The
investment is also recovered from a portion of the savings accrued by the
ULBs (on account of lower electricity bills) over a period of seven years, which
means the ULBs start saving money right from the get-go.
*Lighting demands 18% of the electricity consumed in India. This is against a
global average of just 13%. A large-scale LED adoption will bring the figure for
India down to the global average, significantly cutting down the need to build
more energy plants. If one also accounts for installing LED bulbs in domestic
and commercial sectors, the opportunity at hand is to save a mammoth 100
billion kWh per annum ($7 billion a year).

22. Saving energy is cheaper than creating it.
* A 50 % reduction in lightning usage = an 11%reduction in
global energy usage.
In US, lightning electricity use for residential and commercial
facilities combined equaled 535bn kilo watt –hrs in 2009 (13.6%
of overall electricity usage.
Even with 28% adoption rate for CFL’s, US house holds thrown
aay 5.5mn light bulbs.
Companies with more profits can hire more.
People, who have to spend less on electricity to light their
homes can buy more.

23. By far the most energy efficient, the cleanest
and most eco-friendly way of illumination is
LED lighting, which is basically digital light and
comes with a multitude of amazing benefits
LED: Making the world a better place.
And a more beautiful place.
LED has changed the way the world sees light.
Inefficient, old-style incandescents and CFLs are
being phased out by a lighting technology that can
deliver warm, traditional light or a cooler, more
contemporary white light, all while using a fraction of
the energy and with virtually zero environmental
damage.

24. LED
Light Emitting Diode
Make the World better and
eco-friendly with the use of
LED lights.