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Colors save energy

John Rooymans

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Were we come from

Leading developer of LED applications for general lighting

World’s most efficient LED lighting applications (> 65 lumen / Watt on lamp level)

Dimmable products in Home & Commercial applications

Low cost and easy to use solutions for off-grid Solar LED applications

Targeted, energy saving spectra for Outdoor and Greenhouse segments

Founded in 2005 by Gemex (technology) and Tendris (capital & organization)

Mission: help to reduce global CO2 emissions by offering market-driven, energy-

efficient LED lighting solutions

Rewarding, not penalizing, sustainable behaviour: create a win/win for all

Started market entry in late 2006 with a Retrofit product (Pharox I) and expanded into

Outdoor and Greenhouse in 2007 and Solar in 2009

Sold over 3 million units to date

Offices in Netherlands, US, China, Singapore and South Africa

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Awards, Partners and Endorsers

Dutch Postcode Lottery:

Mass roll out of 2,5 million

Pharox lamps

WEF:

Technology Pioneer

2009 Award

World Bank:

Lighting Africa 2009

Award (Solar LED)

Clinton Climate

Initiative:

Preferred supplier

Fast Company: 2010

Top 10 “most innovative

consumer goods companies”

2010 World Finance “Best Western European cleantech company"

Former President Bill Clinton, USA with the Pharox in 2007

Former Prime Minister Tony Blair, UK with the Pharox in 2009

Dutch Prime Minister Balkenende, Netherlands with Pharox in 2009

U2 singer Bono and TNT CEO Peter Bakker with Pharox in 2009

FIFA South Africa 2010 DEA and UNEP officialOffset CO2 emission holder

Sir Richard Branson promoting the Pharox on TV

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Business units

Home &

Commercial

Public

Lighting

Greenhouse

Lighting

Solar

Lighting

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Standards

• We live by standards but are they right?

The standard for sound is decibels but sounds 80 dB of a classic concert, a

hard-rock concert or a departing jet all the same?

The standard for light is lumen. Is all light the same?

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Spectral distribution serves the eye

The human eye can function from dark to the brightest intensity. The eye can

sense a factor of roughly one billion (109) apart. Its a very dynamic system.

However, photo metrics are defined by static metrics. Variable spectral power

distribution under changing light intensities allow better control of vision like

the tone control with music of varying loudness.

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A new vision on light

The human eye perceives light

different under varying intensities or color

A lux meter does not show that

Vision and sight is not the same under

composed colors

Leds allow spectral combinations for

optimal vision

Science is questioning the lumen standard

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Sam Berman, D. Jewett, B. Benson, T.M. Law Lawrence Berkeley National Laboratory :“Our results measuring power and pupil size indicate that photopic luminous efficacy is an inadequate metric by which to judge the efficacy of indoor illumination”

Source: http://adsabs.harvard.edu/abs/2009OptEL...5..265J

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View of TU/e, TU/delft

LEDs allow tuning of the light spectrum to

the condition of the human eye under

varying light conditions indoor and outdoor,

light to grow plants and for production of

algae and many other applications.

Introduction of this beautiful technology

requires a review of the quality and

performance since they can not properly be

expressed in the classic “incandescent ”

bulb related measures for effective

available light (Lux), the produced flux

(Lumen) and lifetime.

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Vision with the rods and cones

S/P ratio

The human eye contains rods and cones.

Rods are highly effective at low light levels (dawn, night).

Cones are effective at daylight.

Under varying conditions the eye response is very dynamically with

different sensitivities at varying spectral compositions.

The Photometric standards are static and based on use of the cones only

at a peak sensitivity of 555 nm.

At low light levels the eye also uses rods with a high sensitivity at 507 nm.

The S/P ratio indicates for a lamp how much more the efficient a lamp is

under night vision conditions than the photopic standard.

Lemnis developed lamps with S/P ratio’s up to 4 and incorporated S/P

knowledge in all lamps produced, also domestic and office lamps.

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The S/P ratio

S/P ratio stands for how much we see with the rods and how much we see

with our cones. Lumen metrics relate to cone vision only.

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Spectra of lamps - INDOOR

Lumiled, Nichia, Osram white LED 6000K Lemnis LED 2800K CRI 94

Eye-sensitivity curve for the cones = photopic light

The eye-sensitivity curve for photopic light is the measurement ‘line’ for CRI

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Special Power Distribution - INDOOR

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Observe the different spectral power distribution

for warm white lamps at 2800K

and having >80 lm/W

Standard industrial LED’s CRI ~ 75

Lemnis spectrum CRI > 94

CRI measurement is based on photopic light

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Something fundamentally wrong!

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Light directives and standards are based on Photopic

lumen

This is a serious problem because our eyes behave totally

different at night than during daytime.

To benefit of the high sensitivity of the rods light should have

the right spectral composition at different intensities. The

goal is more sight with less light.

Studies show that the ratio between Scotopic (night) en

Photopic (day) vision, the so called S/P ratio, is a base

which can be used to multiply the lumen with to express the

real light perception.

White leds are based on blue chips with 3P or 4P phosphors

to convert the blue light into white light with a peak at 555

nm. In outdoor and most interior lighting the maximal eye

sensitivity is shifted towards 505 nm. Industrial leds produce

the lowest output at that wavelength.

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SOX 70W

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Lemnis ECOwhite 24 W

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The tone control of light and CRI impact - OUTDOOR

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Tone Colors of colors also works indoor

As does tone control of music at high volume

CRI 82 12x36W Fluorecent CRI 29 6x36W Streetlight

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10W mesopic residential street lights

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Schiphol airport

Real green light with high S/P ratio improve vision and color recognition with

60% energy saving.

88 W sodium lamps (background) are replaced

by 36W Lemnis LED lamps (foreground)

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Hybride street light

The low energy consumption of the LED lamp enables solar and wind integration.

Higher initial system cost competes with high cabling and energy cost

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Solar lamp

Equivalent to a 25W bulb. Rigid, long lifetime.

With built-in processor for optimal long term use.

Awarded with lighting up Africa award of the World Bank

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Tunnel lighting 16 W Mesopic

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10 streetlamps of 16W replace 3600W fluorescent tubes

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Streetlight

Streetlight 36W, poles 10 mtr high

S/P ratio 3,7 CRI 29

After rush hour dimmed to 10W

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Morroco, Salé city, 150W replaced by 36W moonlight

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4x 36W along highway next to 250W Sodium lamps

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A greener world

Lemnis has developed a revolutionary concept

that results in the same plant growth compared

to conventional solutions, yet with drastic

reduction of the energy consumption.

With its long lifetime, LEDs reduce cost.

This innovation in greenhouse lighting is the perfect response to the demands

of the sector, society and the government.

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Stacked greenhouse

Using the height of a greenhouse to the

max. crops like crest, lettuce are

a few centimeter high.

With Lemnis stacked LEDs the greenhouse

height of 8 m can be utilized to 3 or 4 layers.

The strawberry lamp with world record

photosynthesis efficiciency of 2,1 umol/m2/sec.

got nominated as most inovative product

at the international Hortifair 2009

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Replacing 100W incandescent with 10W LED

Lamp Power Supplier Spectrum start date end date days

Report plant test laboratory Belgium

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Harvest results

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LED lighting provides 0,7 kg/m² more and better strawberries

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The range of Lemnis lamps

EFFICIENT LIGHTING

2010

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PAR for B2B

PAR 38

Power consumption: 12 and 15 watt

Lumen: ~850 and 1200

Color (CCT): ~2700K

Voltage: 110V-240V

On@once

Base: E27 – E26

Lifetime: up to 25 years

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Rods work also indoor

S/P = 1,14 S/P = 2,47

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The lamp is the luminair

Confidential Lemnis

Lighting

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Flexible reflector Size and angle

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CO2 footprint

2x 26W ballast 15W = 67W Weight 2,1 Kg Recyclable 40% (electronic waste)

Pharox 800 & Pharox 1100 = 12W & 17W Weight 0,19 kg Recyclable 92% (mainly Aluminum)

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CO2 Footprint

15 kWh per kilogram of aluminium produced

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Pharox 1100 17 W

Dual PL 26 W = 52 W

+ Ballast 15 W +

Total 67 W

Click-on frosted diffuser

plate.Light of the 17W Pharox

1100

Equal lux values under

PL

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PAR illuminated office

With conventional lighting: 15 kWh

With 210 x 12W PAR lamps: 2,5 kWh

Same lux on all places

Energy saving:12,5 kWh

ROI: 8 months

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Submersible algae lamps for bio-fuel

Algea grow 200 times faster than testerial plants.

Based on Lemnis spectral power distribution, submersible algea lamps

produce highly efficient bio mass and biofuel in a closed reactor

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Our mission, our ambition

Up to 19% of worldwide electricity is consumed by lighting.

With Lemnis LEDs, 50% of this consumption can be saved.

This is a major positive impact on climate change