LIGHTING DESIGN FOR THE ENERGY EFFICIENT HOME...LIGHTING DESIGN AND TECHNOLOGY • Color Temperature...

LIGHTING DESIGN FOR THE ENERGY EFFICIENT HOME

BETTER BUILDINGS BY DESIGN CONFERENCE 2012

LIGHTING DESIGN AND TECHNOLOGY

• What am I trying to do?

• How am I going to do it?

• What lamp (or light source) will do what I need it to do?

• What fixture will accept that light source?

LIGHTING DESIGN PROCESS



• Color Temperature

• Color Rendering

• Color Changing

• Light Output (actual)

• Lumen Output

• Efficacy

• Distribution

• Dimmability

• Initial Cost

• Operating Cost

• Replacement Cost

• Ease of

Maintenance

• Availability

• Lamp Life

• Physical Size

• Physical

Appearance

• Heat Production

• Fixture Compatibility

• UV Transmittance

• Code Compliance

• Energy Efficiency

• Accessorization

• Soft / Hard Edge

• Effect on People

DETERMINING FACTORS



CODES AND REGULATIONS

IECC 2009• Adopted in ALL northeast states...Vermont as of 1/1/11• Affects residential projects for first time• The essence of the code is...

50% of the total number of SOCKETS in all of the installed fixtures must meet the minimum efficacy requirements established by the IECC 2009 code.

• 40 lumens per watt for lamps less than 15 watts• 50 lumens per watt for lamps from 15 - 40 watts• 60 lumens per watt for lamps from 40 watts and up

***Linear light sources are not defined, but typically use (1) lamp per foot when calculating totals




EISA 2012• Does NOT mean that incandescent lamps are no longer available...no need to stock up on your favorite lamp.• Effective January 2012, 100 watt incandescent A lamps can be maximum of 72 watts and lumen output of 1490-2600• Effective January 2013, 75 watt incandescent A lamps can be maximum of 53 watts and lumen output of 1050-1489• Effective January 2014, 60 watt incandescent A lamps can be a maximum of 43 watts and lumen output of 750-1049• Does not affect rough service, 3-way, G25, G30, T and candelabra based lamps• New efficacy requirements for halogen MR16, PAR20 and PAR30 lamps...most IR halogen lamps meet the requirements already.• 65 watt BR30 lamps are exempt




Energy Star• Energy Star rating does not (necessarily) have anything to do with quality of illumination or quality of light output.• It is a rating that primarily refers to ballast efficiency and LED driver efficiency.• Mostly covers CFL lamps and fixtures, but the list of qualified LED fixtures is growing.• Go to www.energystar.gov for list of Energy Star rated or qualified products• Don’t stray from the design criteria...color temperature, glare control, effective light output, dimmability, effect on people, etc.




DISTRIBUTION OF LIGHT SOURCES



• Energy Efficient Lighting should never “look” energy efficient

• What are the most determining factors?

• Do our determining factors change just because we are using energy efficient fixtures?

• Draw comparisons to energy efficient appliances...are you giving anything up? Are you losing expected qualities in order to achieve energy efficient standards?

• Use the same critical process in selecting energy efficient lighting that you would use for “normal” lighting.

ENERGY EFFICIENT LIGHTING



ENERGY EFFICIENT LIGHTING

• Color Temperature (CCT in Kelvin degrees)

• acceptable range is 2700K - 3000K for most interior applications

• Color Rendering (CRI)

• Distribution

• is the spread of illumination the equal to the existing technology?

• Accurate Replacement Capability

• is it truly a viable replacement for the existing technology?

• is it worth the additional cost?

• Flexibility and “Sustainability”

• will it be obsolete in a year?



LED Cove Lighting

LED TECHNOLOGY



CFL RECESSED INDIRECTLIGHTING

LED TECHNOLOGY LINEAR LED ABOVE CABINET AND UNDER CABINET LIGHTING



• Good for intense, directional lighting

such as highlighting

• Instant “on” to full intensity

• Full range dimming

• No mercury

• Very high initial cost

• Emerging technology with potential to

be obsolete quickly in favor of

advanced product

• Good for wide-spread, softer

illumination

• Not instant “on” to full intensity

• Not true full range dimming

• Mercury disposal issues

• Affordable initial cost

• Established technology that has

improved greatly

LED CFL

LED TECHNOLOGY



• EXACT COLOR TEMPERATURE LISTING

• COMPATIBILITY OF DIMMERS WITH DRIVER (MLV, ELV, 0-10 VOLT)

• ABILITY TO DISSIPATE HEAT

• ABILITY TO CONTROL GLARE

• RELIABILITY OF MANUFACTURER

• REMOTE PHOSPHOR vs. MULTIPLE ARRAY

• SUSTAINABILITY / ABILITY TO UPGRADE COMPONENTS

• LIFE OF LED (LM-70) / LIFE OF DRIVER???

• LENGTH OF WARRANTY...(FIXTURE, FIXTURE + LABOR)

• ACCURATE COMPARISON TO NON-LED LIGHT SOURCE

WHAT TO LOOK FOR

LED TECHNOLOGY



LIGHTING DESIGN FOR THE ENERGY EFFICIENT HOMELIGHTING DESIGN AND TECHNOLOGY

Lumen OutputEfficacy

Color Rendering

Color Temperature

D.O.E. LIGHTING FACTS LABEL

www.ssl.energy.gov/


SPECTRAL POWER DISTRIBUTION



INC

AN

DE

SC

EN

T

3000

K F

LUO

RE

SC

EN

T

3500

K F

LUO

RE

SC

EN

T

4100

K F

LUO

RE

SC

EN

T42

00K

CO

OL

WH

ITE

NO

ON

DAY

LIG

HT

LOW

VO

LTA

GE

HA

LOG

EN

2700

K

3000

K

2850

K

3500

K

4100

K42

00K

6000

K

LIGHTING TERMINOLOGY





•9’-0” x 18’-0”•9’-0” ceiling height•2x10 framing•insulated ceiling•hardwood floors•medium toned painted walls•white painted ceiling


• GLARE CONTROL / EXCELLENT CUT-OFF

• THE SMALLEST APERTURE THAT “DOES THE JOB”

• FLEXIBILITY TO DO ALL (4) TASKS...

• downlight

• wall wash

• adjustable accent

• lensed / wet location

• DEDICATED TECHNOLOGY VS. RETROFIT TECHNOLOGY

• SMOOTH DIMMING REGARDLESS OF LIGHT SOURCE

• QUALITY OF REFLECTORS AND FINISHES

WHAT MAKES A RECESSED LIGHT “GOOD”?




CUT-OFF AND GLARE CONTROL



FIXTURE EFFICIENCY


RECESSED LIGHTS




•13’-3” x 14’-0”•9’-0” ceiling height•2x10 framing•insulated ceiling•hardwood floors•medium toned painted walls•white painted ceiling•artwork on right side wall with sideboard below•artwork on top wall (at mech. room)•hutch on left wall



•13’-3” x 12’-0”•9’-0” ceiling height•2x10 framing•insulated ceiling•hardwood floors•paint grade built-ins...use TBD•white painted ceiling



•22’-6” x 13’-6”•9’-0” ceiling height•2x10 framing•insulated ceiling•hardwood floors•medium toned painted walls•white painted ceiling•natural cherry cabinets...not all the way to the ceiling•honed stone countertops•tumbled marble tile backsplash


• LINEAR VS. NON-LINEAR

• WHERE DOES IT GET MOUNTED? (FRONT EVERY SINGLE TIME)

• WHAT IS IT BEING USED FOR?

• LINE VOLTAGE VS. LOW VOLTAGE (REMOTE VS. INTEGRAL)

• UNDERSTANDING SNELL’S LAW...VEILING REFLECTIONS

• MANAGING HEAT OUTPUT FROM FIXTURES

• TYPICAL SOURCES ARE XENON, HALOGEN, LINEAR FLUORESCENT

AND LED

• MULTIPLE SHADOW EFFECT

UNDER CABINET LIGHTING




•18’-3” x 15’-0”•9’-0” ceiling height to spring line•18’-0” at ridge line•insulated ceiling•hardwood floors•medium toned painted walls•white painted ceiling•textured stone full height fireplace•exposed wooden collar tie beams•balcony lookout from second floor hall•open to Nook / Kitchen on right side•floating furniture groupings•built-in TV cabinetry in alcove


• PROPER DISTANCES ARE THE KEY

• distance from fixture to back wall

• distance from fixture to closest ceiling surface

• MEET EXPECTATIONS...

• is it purely an accent light?

• does it need to provide more general illumination?

• it will ALWAYS be brightest closest to the light source

• THE SAME DETERMINING FACTORS ARE IMPORTANT...

• lamp life, wattage consumption, heat production, etc.

EFFECTIVE COVE LIGHTING




•9’-0” x 22’-9”•8’-6” ceiling height•2x10 framing•insulated ceiling•hardwood floors•medium toned painted walls•white painted ceiling



•13’-3” x 14’-6”•8’-0” ceiling height to spring line•10’-0” to upper flat ceiling•2x10 framing•insulated ceiling•hardwood floors•medium toned painted walls•white painted ceiling



•13’-3” x 11’-3”•8’-0” ceiling height to spring line•10’-0” to upper flat ceiling•2x10 framing•insulated ceiling•hardwood floors•medium toned painted walls•white painted ceiling


WATTS

100

75

50

50

50

LAMP (BULB) SPECIFICATION

SHAPE

A

PAR

PAR

MR

MR

SIZE

19

30

20

16

16

ATTRIBUTESIF

NFL25

FL/FROST

FL40

IR/NFL25



WATTS

F32

F032

F25

F025

CF32


SHAPE

T

T

DT

SIZE

8

8

ATTRIBUTES

SPX30

830

SP41

741

E/IN/835



INVERSE SQUARE LAW

FOOTCANDLES = CBCP / DISTANCE SQUARED

Q50MR16/CFL40

1700 CBCP6’ DISTANCE

47 FOOTCANDLES

50 WATTS

Q50MR16/HIR/CG40


72 FOOTCANDLES

50 WATTS

Q37MR16/HIR/CG40


56 FOOTCANDLES

37 WATTS



DETERMINING FACTORS


LIGHTING DESIGN FOR THE ENERGY EFFICIENT HOME...LIGHTING DESIGN AND TECHNOLOGY • Color Temperature...

Documents

Transcript of LIGHTING DESIGN FOR THE ENERGY EFFICIENT HOME...LIGHTING DESIGN AND TECHNOLOGY • Color Temperature...