02/03/2016
The Application of Quantum
Physics in the Ecclesiastical
Setting, with reference to the
Nobel Prize-Winning work of
Shuji Nakamura et al (2014)
Better Lighting for Churches:
Today I am going to Make It Easier for you to….
Improving Efficiency and Safety with LEDs
- Understand the different types of lighting used in churches
Ian Simpson
MBA CBIFM
Heritage Officer, Diocese of Liverpool
- Save money by using modern LED lighting
- Care for the environment and reduce your lighting’s carbon footprint
- Improve safety in your church by using LED lighting
- Make the case to your PCC for switching to LEDs
to light your church effectively
to light your church effectively
Types of Light Bulb
Types of Light Bulb
1. Traditional Tungsten Filament
2. Halogen / “Eco-Halogen”
Works using the heating coil principle – when you pass electricity through a coil,
the coil heats up. The light it gives off is almost a by-product!
Also works by heating up a filament – the filament is inside a “bubble” of inert
halogen gas.
Very inefficient (Energy Rating E) so expensive to run.
More efficient than Tungsten Filament – but not by much. Energy rating D.
Short lamp life (2,000hrs).
Short lamp life (2,000hrs).
Fire risk if wattage exceeds rating for fitting / shade.
Lower temperature (and therefore fire risk) than Tungsten Filament.
Very cheap to replace.
Not as cheap as Tungsten Filament.
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02/03/2016
to light your church effectively
to light your church effectively
Types of Light Bulb
Types of Light Bulb
3. Fluorescent / Compact Fluorescent
4. High Pressure Sodium
Generates ultra-violet light which makes the white phosphor coating on the
inside of the glass glow.
Works by passing electricity through sodium and mercury vapour in an inert gas
atmosphere.
Energy efficient (rating A or B)
Relatively efficient but efficiency declines sharply with age.
Medium lamp life (up to 10,000hrs).
Requires a ballast (CFL bulbs have this built in) so don’t start instantly. Never mix
CFL and Tungsten bulbs in the same fitting!
Full of hazardous chemicals – must not be disposed of in normal waste
Fairly long lamp life (up to 18,000hrs).
Takes time to heat up and start.
Full of hazardous chemicals – must not be disposed of in normal waste
Flickering light can be problematic for people with Autism.
Poor colour rendition.
to light your church effectively
to light your church effectively
Types of Light Bulb
LEDs – A 21st Century Wonder!
5. Light Emitting Diode (LED)
They were actually invented – in the USSR – in 1927.
Light is generated by the movement of electrons between two different
semiconductors when an electric current is applied.
Became mainstream in low-power usage and electronics from the 1970s.
Extremely efficient (Energy rating A or better)
Rapid development in LED technology from about 2005 onwards.
Very long lamp life (typically up to 40,000hrs).
The “Holy Grail” for LED technology was a true white LED for which Nakamura’s
team won the 2014 Nobel Prize.
Starts instantly.
No hazardous chemicals, doesn’t generate heat, so very low risk.
Colour rendition has improved dramatically now.
to light your church effectively
Save Money
to light your church effectively
Care for the Planet
To run 50 x 60W tungsten light bulbs for one year costs
£764
If every incandescent light bulb in the world were replaced by LEDs, the electricity
consumption of the planet would IMMEDIATELY go down by….
To run 50 LED bulbs of equivalent output for one year costs
£127
a) 0.5%
That’s an annual saving of
£637
b)1.5%
c) 5%
d) 10%
e) 14.5%
In the US alone, the saving would be 2,700TWh over 20 years, worth $250 billion!
Over the 20 year life of an LED bulb you save
£12,740
In addition LEDs do not contain harmful mercury, sodium or barium found in other
types of light bulb!
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02/03/2016
to light your church effectively
to light your church effectively
Be Safer
Some Practical Points
How high are your current light fittings? Who changes the bulbs?
LED bulbs are available to fit most standard fittings – ask your electrician if you aren’t
sure.
Working at height is the #1 cause of accidents in the workplace and the best way to
prevent accidents is to avoid working at height.
A full relamping of a church with LEDs by an electrical firm should cost £1,500 to
£2,000.
LED lights once installed will last for 20 years before anyone needs to go up and
replace them.
And remember the lower operating temperature of LED lights reduces the risk of fire!
If you need replacement fittings you will need your Archdeacon’s permission as this is
a “List B” item (FJ R 15, B1 (6)).
LEDs offer real scope for creativity. LED colour-changing lights, tape lights, rope lights –
the sky is the limit!
to welcome visitors and tourists
The End.
Give us your feedback at:
www.liverpool.anglican.org/MIEFeedback
Thank you for listening!
Any questions?
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