ecobuild 2014: light sense - product presentation
TRANSCRIPT
LightSense
LightSense (LightSense Lighting
Solutions Ltd.) specialises in the
development and supply of high
performance, advanced LED lighting.
Brendon Airey – Technical Manager
Welcome to LightScene at EcoBuild:
Electrical Safety Compliance with LED Units
Retrofitting LED lamps to replace
Fluorescent Tubes or Street Lights
You have all seen the BIG claims by LED Lamp resellers and manufacturers. However
before you buy there are a lot of things to consider.
Some of those considerations will be:-
- Will the LED lamp give out the same light that we are used to?
- How do they fit?
- How much will we save?
- How many do we need?
Unfortunately little thought is given to the most important question of all:-
- Are the retrofit lamps SAFE?
In the UK all fixed (hard wired) electrical products need to be installed in accordance to the IEE
Wiring Regulations (BS7671) which conformity should result in also conforming to Electricity at
Work Regulations 1989. In doing so you shall adhere to The Health and Safety at work ACT.
of a LED “Retrofit” Lamps.
Electrical Safety
Ensuring that this is carried out there are various bodies
NICEIC / ECA / Nappit / HSE / Electrical Safety Council
that police the products and the services that installers and
manufacturers provide.
Various tests have been carried out by a number of
authorities in the UK as to the safety of LED „retrofit‟ lamps
Safety Testing of LED Tubes
The Electrical Safety Council commissioned a report with Nemko to carry out safety
testing on randomly selected LED tubes available online in the UK (the full report is
available on their website)
BS7671 (IEE Wiring Regulations) States: - Electrical equipment shall be installed in accordance with
the instructions provided by the manufacturer of the equipment.
The above clearly shows that conforming to BS7671 and ultimately the Health and Safety at Work Act
cannot be done whilst installing LED retrofit lamps, thus possibly placing the onus of compliance onto
the installer.
Therefore, who is liable for dangerous situations that may occur if retrofitting LED Tubes?
• The original Luminaire manufacturer?
• The LED Tube manufacturer?
• The supplier?
• The specification company?
• The Installer?
• The purchaser?
• The building Owners?
Safety Testing of LED Tubes• NEMKO Summary
Conclusions & Recommendations
When fitting the LED retro fit lamps into electronic control gear luminaires all four LED retrofit lamps
submitted for test required the ballast to be disconnected by a licensed electrician, which add
additional labour costs to retrofit installation. In practise this modification is likely to be carried out by
the person purchasing the retrofit lamp who may or may not have the competence to carry out the
modification. This is a potential hazard. Modification of the original fitting would also cause issues of
liability in the case of a fault.
All of the LED retro fit lamps that required removal of the control gear were potentially hazardous
during the removal and replacement of these LED retro fit lamps. All of the instructions (where
available) stated that the supply should be turned off when replacing the lamp, however in practise if
the lamp is faulty (not lit) it may be difficult to tell whether the fitting is energized or not.
The modification itself may also be considered hazardous if not carried out by a competent person.
After modification the fittings also present further hazards if refitted with the original or replacement
fluorescent lamps. A label (provided by the retrofit kit manufacturer) affixed to the modified fitting
indicating that the luminaire has been modified and can no longer operate as originally intended may
help to reduce the risks on this point.
What questions should be being
asked re: LED Lamps?• Would the original manufacturer instruct LED retrofit lamps to be
installed inside their light fitting (Compliance with BS7671)?
• Are the original components suitable to be used in conjunction with LED retrofit lamps (Brittle end caps, Cable characteristics)?
• Will the LED lamp‟s light output comply with the original lighting design of the environment where it‟s to be installed?
• In the event of a fault (not a failure) who accepts liability?
• Does the electrical contractor have the relevant insurance to modify and change characteristics of an original luminaire?
T8 Luminaires designed for
fluorescent lamps• Cables may not be rated to connect 230volts to the LED tube!
• End caps not rated correctly for Direct AC 230Volt supply!
• No LED Heat management!
• Reflector may be ineffective due to directional LEDs and age!
• What could happen once the fitting has been modified and the
LED lamp is no longer available?
Street Lighting Luminaires
Various discussions on social media have sparked furious debate over the suitability of LED Corn Lamps to be fitted into Street Lighting Luminaires.
Example
80Watt LED Fan assisted lamp to be used in an existing IP65 Street Light.
No regard to:
- Light Output
- Heat dissipation (Other than cooling fan on LED unit)
- Colour temp
- Age of existing luminaire
- Height of Column
- CRI
Summary
• If the original fitting requires alteration then it may not be
compliant.
• If the original fitting does not require alteration of the fitting it
cannot be efficient.
• Explore the replacement of the whole luminaire to a complete
LED product.
What is LED equivalent to?
There is no hard fast calculation as there are numerous different LED chips and optics on the market.
The magic word is “Efficacy”.
Luminaire lumens per circuit watt.
- GU10 50watt halogen lamp is approx 520lumens. = 10.4 ll/cW
- LightSense GU10 6.8Watt LED lamp is 400 lumens = 58.82ll/cW
So this LED lamp is nearly 6x more efficient.
LLS-NC50W Twin 58Watt(5%-10% for ballast) T8 Tube – non corrosive
LLS-P0606 32Watt 4 x 18Watt (72Watts plus 5%-10% for ballast) lay-in modular
What defines a good / bad LED?
• LM80 Data provides a information that can extrapolated to calculate lifetime. L90/L80/L70 or down to L50 (for decorative luminaires.) This is where manufacturers get there lifetime claims from.
• CRI – The colour rendering index, sometimes called colour rendition index, is a measure of the ability of a light source to reproduce the colours of various objects in comparison with a natural light source.
• Stability of colour temperature – Over time colours may degrade as the LED cycles in temperature. At LightSense for most products we use a 3 step ellipse to ensure colour quality over time. The shift in temperature should not be noticeable by the human eye. This ensures that projects that use LightSense luminaires can be phased over to LED.
Mind the smoke in-front of that
mirror.
• Luminaire lumens per watt vs Luminaire lumens per
circuit watt
• Lumen output Vs Initial lumen output
• Independent Data – LightSense ensures all products are
independently tested in the UK to UKAS standards to
ensure that we can prove our claims.
Our ProductsLightSense offers a high quality range of
LED luminaires in a variety of
designs, suitable for
Industrial, Commercial and Domestic
applications.
Our UK based R&D department
work tirelessly to source and
develop new products and ensure
that we remain at the forefront of
LED lighting technology.
LLS-P0606 600 x 600 Panel
Dimmable as standard,
Day White (~4000k) or
Cool White (~6000k)
LLS-P0612 600 x 1200 Panel
Dimmable as standard,
Day White (~4000k) or
Cool White (~6000k)
LLS-P0312 300 x 1200 Panel
Dimmable as standard,
Day White (~4000k) or
Cool White (~6000k)
LLS-P0303** 300 x 300 Panel
Dimmable as standard,
Day White (~4000k) or
Cool White (~6000k)
LLS-P0306** 300 x 600 Panel
Dimmable as standard,
Day White (~4000k) or
Cool White (~6000k)
LLS-P01512** 150 x 1200 Panel
Dimmable as standard,
Day White (~4000k) or
Cool White (~6000k)
LLS-P0202** 200 x 200 Panel
Dimmable as standard,
Day White (~4000k) or
Cool White (~6000k)
LED Panels vary in quality & performance.
The LightSense Panel range has the following
benefits:-
- Thick 6mm Light Guide
- PMMA Diffuser
- 2700Lumens
- Dimmable on 1-10Volt as standard (soon
to be switchDIM also)
Our ProductsAll LightSense products undergo UK based photometric
testing. Dr Gareth John of Photometric and Optical Testing
reviewed our 600 x 600 Panel in the August 2013 issue of
Lighting magazine.
The overall conclusion was that
the high efficacy, CRI and low
unified glare rating “make the
LightSense panel a logical
solution for anybody looking to
install a luminous ceiling”The full article is available on our website:
http://www.ledlightsense.co.uk/photometry-focus
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Why use LightSense?
• Support – Product support is overlooked in the LED Lighting Market. LightSensecolleagues have a diverse background so we can be your led at the end of the tunnel.
• Proud of our price! – We make our products to the highest standards. Therefore we may not be the cheapest but the best value for money.