2012 DOE SOLID-STATE LIGHTING R&D WORKSHOP

Panel 3—Where Is the SSL Revolution Headed? Steve Paolini - CTO, Lunera Lighting

spaolini@lunera.com

1 Lunera Lighting 2012

LONG TERM SUCCESS IN SSL

• Depends on more than saving energy • Depends on more than lower price

– Reliability, Lifetime, Color Quality, Consistency

• Depends on more than on/off – Sensors, Modulation, Content

• Depends on more than replacement – Spectral, Temporal, Spatial/Angular, Forms/Functions

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THERE IS MORE TO LIGHT THAN WHITE

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Green

Red

Blue

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5,225K

Photopic

wavelength, nm

arbi

trar

y u

nits

SPECTRAL POWER DISTRIBUTION – SPD

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TUNABLE SPECTRUM LIGHT – the way nature does it

• RGB is not enough – Too many gaps, inefficient green

• Five colors are a good balance (efficacy, cost) – Example recipe:

• R624p, G519p, B472p, CW6300K, PC(.405, .488)

• Light value increases as LED count goes up

– Falling prices make this a practical trend – Analogous to transistor count increases

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3,000K, 144 lm/w (LED), 93 CRI - LEDs are under-driven

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6300K

Over-converted yellow/green

624p

519p

472p

Pump LED

(.405, .488)

5,000K, 134 lm/w (LED), 90 CRI - LEDs are under-driven

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LUMINOUS EFFICIENCY COLOR QUALITY

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LUMINOUS EFFICIENCY RADIENT EFFICIENCY

10% loss, power supply 10% loss, optics 5% loss, heat 5% loss, manufacturing tolerance

Well designed luminaire with modest beam shape and mixing requirements: { 10

Lunera Lighting 2012 11

If you think under-driving LEDs and 5-color luminaires are not viable?

It’s already happening.

UNDER-DRIVEN LEDs

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LUNERA - 2' X 2‘, 22G3-3500K

CREE - 2' X 4‘, CR24-40L-44W-40K

PHILIPS – A19, 800lm, 2700K

SCALED SIZE

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Vivid Theater Healing

Study Relax Sleep 14

349, -157 and -095 series LEDs 121 WW, 96 CW, 44 R, 44 G, 44 B

Nov’11 retail, 79,800 yen ($1,000)

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Daylight Harvest

Night Light

Up Light

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Dual Processors

RGB WW/CW

Primary AC/DC 145VDC out

6 current drivers

Factory Programming

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Spectral

Temporal

Spatial/Angular

Forms/Functions

STATE OF THE ART SPECTRAL CONTROL - 2011

– courtesy Telelumen 19

Recorded on Mt. Hamilton, CA at Lick Observatory, 9mar11 – courtesy Telelumen

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Daylight Chromaticity Over 4-Hour Period

“GLOWING WALLS” IALD AWARD WINNER 2009

Fraunhofer Institute, LEiDs GmbH ceiling tiles – RGB and white LEDs simulate sky with moving clouds

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http://www.fraunhofer.de/en/press/research-news/2012/january/sky-light-sky-bright.html

LARGE SCALE LUMINOUS FORMS

TAKE AWAY POINTS

• Success depends on more than saving energy • Success depends on more than lower price

– Reliability, Lifetime, Color Quality, Consistency

• Success depends on more than on/off – Sensors, Modulation, Content

• Success depends on more than replacement – Spectral, Temporal, Spatial/Angular, Forms/Functions

25 Lunera Lighting 2012