EFFICIENT LIGHTING STRATEGIES

INITIAL DESIGN RECOMMENDATIONS

Home designers and builders can reduce lighting energy use

by selecting light fixtures and sources that use energy more

efficiently, and by installing controls to reduce the amount of

time lights are on.

INDOORS

• Maximize the use of daylighting.

• Install fluorescent light fixtures for all ceiling- and wallmounted fixtures that will be on for more than 2 hours each

day. These often include the fixtures in the kitchen and living

room, and sometimes those in bathrooms, halls, bedrooms,

and other higher-demand locations. Install dedicated compact

fluorescent fixtures, rather than CFLs in incandescent fixtures,

so that fluorescent bulbs continue to be used for the life of

the house.

• Encourage occupants to use CFLs in portable lighting fixtures

that are operated for more than 2 hours a day.

• If recessed lights are used in a ceiling with an unconditioned

space above it, use only Underwriters Laboratory (UL)

approved fixtures that are airtight, are IC (insulation contact)

rated, and meet ASTM E283 requirements.

• Also consider

- Light wall colors to minimize the need for artificial lighting.

- Energy Star® lighting fixtures.

- Occupancy detector controls.

OUTDOORS

• Security and utility lighting does not need to be bright to be

effective.

• Use fluorescent, HID, or low-pressure sodium lights unless

incandescent lights are automatically controlled to be on for

just a few minutes each day.

• Consider incandescent flood lights with combined

photosensors and motion sensors in the place of other

security lighting options.

• Make sure outdoor light fixtures have reflectors, deflectors, or

covers to make more efficient use of the light source and help

reduce light pollution.

• In most applications, use

- Photosensors to turn off lights during daylight hours.

- Motion detectors to activate security or utility lighting

when needed.

- Timers and other controls to turn decorative lighting on

and off.

Insulation Contact (IC) rated recessed

fixtures allow complete coverage of

insulation in attic installations.

○○○○○○○○○○

DEDICATED COMPACT FLUORESCENT FIXTURES

Installing compact fluorescent fixtures that accept only

CFLs ensures lifelong energy-saving benefits. Many new

CFL fixtures offer a dimmable feature and perform much like

incandescent fixtures.

○○○○○○○○○○○○○○○
LIGHTING DESIGN CONCEPTS

Energy-efficient lighting design focuses on methods and

materials that improve both quality and efficiency of lighting.

Energy-efficient lighting design principles include the following:

• Keep in mind that more light is not necessarily better. Human

visual performance depends on light quality as well as quantity.

• Match the amount and quality of light to the performed

function.

• Install task lights where needed and reduce ambient light

elsewhere.

• Use energy-efficient lighting components, controls, and systems.

• Maximize the use of daylighting.

INTERIOR LIGHTING OPTIONS

DAYLIGHTING

Daylighting is the use of windows and skylights to bring

daylight into the home. Today’s highly efficient windows and

advances in lighting design allow efficient use of windows to

reduce the need for artificial lighting during daylight hours

without causing heating or cooling problems. The sizes and

locations of windows should be based on the cardinal

directions rather than their effect on the street-side appearance

of the house, for example. South-facing windows are most

advantageous for daylighting and for moderating seasonal

temperatures because they allow most winter sunlight into the

home but little direct sun during the summer, especially when

properly shaded. North-facing windows are also advantageous

for daylighting because they admit relatively even, natural light,

producing little glare and almost no unwanted summer heat

gain. Although east- and west-facing windows provide good

daylight penetration in the morning and evening, respectively,

they should be limited because they may cause glare, admit a

lot of heat during the summer when it is usually not wanted,

and contribute little to solar heating during the winter.

INDOOR LIGHTING TECHNOLOGIES

Incandescent lighting has traditionally delivered about 85

percent of household illumination. Incandescents operate without

a ballast, are dimmable and instantly controllable, and light up

instantly. Most familiar are the standard pear-shaped, screw-in

“A”-type incandescent light bulbs. They produce a warm light and

provide excellent color rendition. They have a low efficacy

compared to all other lighting options (10 to 17 lumens per watt)

and a short average operating life (750 to 2500 hours).

Incandescent lamps can be made in other shapes and

variations. Tungsten halogen lamps provide excellent color

rendition. Reflector (R) and parabolic aluminized reflector

(PAR) lamps direct light in a desired direction. All three are

slightly more efficient than standard bulbs, have longer

operating lives (2000 to 4000 hours), and are often used for

accent lighting.

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)sruoh(

xedninoitidnerroloC

)IRC(

erutarepmetroloC

)K(

Incandescent

S 7 blub"A"dradnat 1 0 1-0 7 ) 052-05 9 ) tnellecxE(001-8 mraW(0082-0072

T 2 negolahnetsgnu 1 0 2-2 2 ) 004-000 9 ) tnellecxE(001-8 lartuenotmraW(0023-0092

R 9 )R(rotcelfe 1 0 1-2 2 ) 003-000 9 ) tnellecxE(001-8 mraW(0082

P 9 )RAP(rotcelferdezinimulacilobara 1 0 1-2 2 ) 003-000 9 ) tnellecxE(001-8 mraW(0082

Fluorescent

S 0 ebutthgiart 3 0 11-0 7 ) 00,42-000 5 ) doogotriaF(09-0 dlocotmraW(0056-0072

C 0 )LFC(pmaltnecseroulftcapmo 5 0 7-0 1 ) 00,0 6 ) dooG(88-5 dlocotmraW(0056-0072

C 0 enilucri 4 0 5-0 00,21

oor Lighting

M 0 ropavyrucre 2 0 6-5 1 ) 00,42-000,6 5 ) riafotrooP(0 dlocotmraW(0007-0023

M 5 edilahlate 7 0 11-0 5 ) 00,02-000 7 ) riaF(0 dloC(0073

H 0 muidoserusserp-hgi 5 0 41-0 1 ) 00,42-000,6 2 ) rooP(5 mraW(0012

L 0 muidoserusser-wo 6 0 51-0 1 ) 00,81-000,2 roopyreV(44-

Outd

p

BULB COMPARISON CHART
LIGHTING DESIGN CONCEPTS

Energy-efficient lighting design focuses on methods and

materials that improve both quality and efficiency of lighting.

Energy-efficient lighting design principles include the following:

• Keep in mind that more light is not necessarily better. Human

visual performance depends on light quality as well as quantity.

• Match the amount and quality of light to the performed

function.

• Install task lights where needed and reduce ambient light

elsewhere.

• Use energy-efficient lighting components, controls, and systems.

• Maximize the use of daylighting.

INTERIOR LIGHTING OPTIONS

DAYLIGHTING

Daylighting is the use of windows and skylights to bring

daylight into the home. Today’s highly efficient windows and

advances in lighting design allow efficient use of windows to

reduce the need for artificial lighting during daylight hours

without causing heating or cooling problems. The sizes and

locations of windows should be based on the cardinal

directions rather than their effect on the street-side appearance

of the house, for example. South-facing windows are most

advantageous for daylighting and for moderating seasonal

temperatures because they allow most winter sunlight into the

home but little direct sun during the summer, especially when

properly shaded. North-facing windows are also advantageous

for daylighting because they admit relatively even, natural light,

producing little glare and almost no unwanted summer heat

gain. Although east- and west-facing windows provide good

daylight penetration in the morning and evening, respectively,

they should be limited because they may cause glare, admit a

lot of heat during the summer when it is usually not wanted,

and contribute little to solar heating during the winter.

INDOOR LIGHTING TECHNOLOGIES

Incandescent lighting has traditionally delivered about 85

percent of household illumination. Incandescents operate without

a ballast, are dimmable and instantly controllable, and light up

instantly. Most familiar are the standard pear-shaped, screw-in

“A”-type incandescent light bulbs. They produce a warm light and

provide excellent color rendition. They have a low efficacy

compared to all other lighting options (10 to 17 lumens per watt)

and a short average operating life (750 to 2500 hours).

Incandescent lamps can be made in other shapes and

variations. Tungsten halogen lamps provide excellent color

rendition. Reflector (R) and parabolic aluminized reflector

(PAR) lamps direct light in a desired direction. All three are

slightly more efficient than standard bulbs, have longer

operating lives (2000 to 4000 hours), and are often used for

accent lighting.

ycaciffE

)ttaw/snemul(

emitefiL

)sruoh(

xedninoitidnerroloC

)IRC(

erutarepmetroloC

)K(

Incandescent

S 7 blub"A"dradnat 1 0 1-0 7 ) 052-05 9 ) tnellecxE(001-8 mraW(0082-0072

T 2 negolahnetsgnu 1 0 2-2 2 ) 004-000 9 ) tnellecxE(001-8 lartuenotmraW(0023-0092

R 9 )R(rotcelfe 1 0 1-2 2 ) 003-000 9 ) tnellecxE(001-8 mraW(0082

P 9 )RAP(rotcelferdezinimulacilobara 1 0 1-2 2 ) 003-000 9 ) tnellecxE(001-8 mraW(0082

Fluorescent

S 0 ebutthgiart 3 0 11-0 7 ) 00,42-000 5 ) doogotriaF(09-0 dlocotmraW(0056-0072

C 0 )LFC(pmaltnecseroulftcapmo 5 0 7-0 1 ) 00,0 6 ) dooG(88-5 dlocotmraW(0056-0072

C 0 enilucri 4 0 5-0 00,21

oor Lighting

M 0 ropavyrucre 2 0 6-5 1 ) 00,42-000,6 5 ) riafotrooP(0 dlocotmraW(0007-0023

M 5 edilahlate 7 0 11-0 5 ) 00,02-000 7 ) riaF(0 dloC(0073

H 0 muidoserusserp-hgi 5 0 41-0 1 ) 00,42-000,6 2 ) rooP(5 mraW(0012

L 0 muidoserusser-wo 6 0 51-0 1 ) 00,81-000,2 roopyreV(44-

Outd

p

BULB COMPARISON CHART
LIGHTING DESIGN CONCEPTS

Energy-efficient lighting design focuses on methods and

materials that improve both quality and efficiency of lighting.

Energy-efficient lighting design principles include the following:

• Keep in mind that more light is not necessarily better. Human

visual performance depends on light quality as well as quantity.

• Match the amount and quality of light to the performed

function.

• Install task lights where needed and reduce ambient light

elsewhere.

• Use energy-efficient lighting components, controls, and systems.

• Maximize the use of daylighting.

INTERIOR LIGHTING OPTIONS

DAYLIGHTING

Daylighting is the use of windows and skylights to bring

daylight into the home. Today’s highly efficient windows and

advances in lighting design allow efficient use of windows to

reduce the need for artificial lighting during daylight hours

without causing heating or cooling problems. The sizes and

locations of windows should be based on the cardinal

directions rather than their effect on the street-side appearance

of the house, for example. South-facing windows are most

advantageous for daylighting and for moderating seasonal

temperatures because they allow most winter sunlight into the

home but little direct sun during the summer, especially when

properly shaded. North-facing windows are also advantageous

for daylighting because they admit relatively even, natural light,

producing little glare and almost no unwanted summer heat

gain. Although east- and west-facing windows provide good

daylight penetration in the morning and evening, respectively,

they should be limited because they may cause glare, admit a

lot of heat during the summer when it is usually not wanted,

and contribute little to solar heating during the winter.

INDOOR LIGHTING TECHNOLOGIES

Incandescent lighting has traditionally delivered about 85

percent of household illumination. Incandescents operate without

a ballast, are dimmable and instantly controllable, and light up

instantly. Most familiar are the standard pear-shaped, screw-in

“A”-type incandescent light bulbs. They produce a warm light and

provide excellent color rendition. They have a low efficacy

compared to all other lighting options (10 to 17 lumens per watt)

and a short average operating life (750 to 2500 hours).

Incandescent lamps can be made in other shapes and

variations. Tungsten halogen lamps provide excellent color

rendition. Reflector (R) and parabolic aluminized reflector

(PAR) lamps direct light in a desired direction. All three are

slightly more efficient than standard bulbs, have longer

operating lives (2000 to 4000 hours), and are often used for

accent lighting.

ycaciffE

)ttaw/snemul(

emitefiL

)sruoh(

xedninoitidnerroloC

)IRC(

erutarepmetroloC

)K(

Incandescent

S 7 blub"A"dradnat 1 0 1-0 7 ) 052-05 9 ) tnellecxE(001-8 mraW(0082-0072

T 2 negolahnetsgnu 1 0 2-2 2 ) 004-000 9 ) tnellecxE(001-8 lartuenotmraW(0023-0092

R 9 )R(rotcelfe 1 0 1-2 2 ) 003-000 9 ) tnellecxE(001-8 mraW(0082

P 9 )RAP(rotcelferdezinimulacilobara 1 0 1-2 2 ) 003-000 9 ) tnellecxE(001-8 mraW(0082

Fluorescent

S 0 ebutthgiart 3 0 11-0 7 ) 00,42-000 5 ) doogotriaF(09-0 dlocotmraW(0056-0072

C 0 )LFC(pmaltnecseroulftcapmo 5 0 7-0 1 ) 00,0 6 ) dooG(88-5 dlocotmraW(0056-0072

C 0 enilucri 4 0 5-0 00,21

oor Lighting

M 0 ropavyrucre 2 0 6-5 1 ) 00,42-000,6 5 ) riafotrooP(0 dlocotmraW(0007-0023

M 5 edilahlate 7 0 11-0 5 ) 00,02-000 7 ) riaF(0 dloC(0073

H 0 muidoserusserp-hgi 5 0 41-0 1 ) 00,42-000,6 2 ) rooP(5 mraW(0012

L 0 muidoserusser-wo 6 0 51-0 1 ) 00,81-000,2 roopyreV(44-

Outd

p

BULB COMPARISON CHART
EFFICIENT LIGHTING STRATEGIES

INITIAL DESIGN RECOMMENDATIONS

Home designers and builders can reduce lighting energy use

by selecting light fixtures and sources that use energy more

efficiently, and by installing controls to reduce the amount of

time lights are on.

INDOORS

• Maximize the use of daylighting.

• Install fluorescent light fixtures for all ceiling- and wallmounted fixtures that will be on for more than 2 hours each

day. These often include the fixtures in the kitchen and living

room, and sometimes those in bathrooms, halls, bedrooms,

and other higher-demand locations. Install dedicated compact

fluorescent fixtures, rather than CFLs in incandescent fixtures,

so that fluorescent bulbs continue to be used for the life of

the house.

• Encourage occupants to use CFLs in portable lighting fixtures

that are operated for more than 2 hours a day.

• If recessed lights are used in a ceiling with an unconditioned

space above it, use only Underwriters Laboratory (UL)

approved fixtures that are airtight, are IC (insulation contact)

rated, and meet ASTM E283 requirements.

• Also consider

- Light wall colors to minimize the need for artificial lighting.

- Energy Star® lighting fixtures.

- Occupancy detector controls.

OUTDOORS

• Security and utility lighting does not need to be bright to be

effective.

• Use fluorescent, HID, or low-pressure sodium lights unless

incandescent lights are automatically controlled to be on for

just a few minutes each day.

• Consider incandescent flood lights with combined

photosensors and motion sensors in the place of other

security lighting options.

• Make sure outdoor light fixtures have reflectors, deflectors, or

covers to make more efficient use of the light source and help

reduce light pollution.

• In most applications, use

- Photosensors to turn off lights during daylight hours.

- Motion detectors to activate security or utility lighting

when needed.

- Timers and other controls to turn decorative lighting on

and off.

Insulation Contact (IC) rated recessed

fixtures allow complete coverage of

insulation in attic installations.

○○○○○○○○○○

DEDICATED COMPACT FLUORESCENT FIXTURES

Installing compact fluorescent fixtures that accept only

CFLs ensures lifelong energy-saving benefits. Many new

CFL fixtures offer a dimmable feature and perform much like

incandescent fixtures.

○○○○○○○○○○○○○○○
EFFICIENT LIGHTING STRATEGIES

INITIAL DESIGN RECOMMENDATIONS

Home designers and builders can reduce lighting energy use

by selecting light fixtures and sources that use energy more

efficiently, and by installing controls to reduce the amount of

time lights are on.

INDOORS

• Maximize the use of daylighting.

• Install fluorescent light fixtures for all ceiling- and wallmounted fixtures that will be on for more than 2 hours each

day. These often include the fixtures in the kitchen and living

room, and sometimes those in bathrooms, halls, bedrooms,

and other higher-demand locations. Install dedicated compact

fluorescent fixtures, rather than CFLs in incandescent fixtures,

so that fluorescent bulbs continue to be used for the life of

the house.

• Encourage occupants to use CFLs in portable lighting fixtures

that are operated for more than 2 hours a day.

• If recessed lights are used in a ceiling with an unconditioned

space above it, use only Underwriters Laboratory (UL)

approved fixtures that are airtight, are IC (insulation contact)

rated, and meet ASTM E283 requirements.

• Also consider

- Light wall colors to minimize the need for artificial lighting.

- Energy Star® lighting fixtures.

- Occupancy detector controls.

OUTDOORS

• Security and utility lighting does not need to be bright to be

effective.

• Use fluorescent, HID, or low-pressure sodium lights unless

incandescent lights are automatically controlled to be on for

just a few minutes each day.

• Consider incandescent flood lights with combined

photosensors and motion sensors in the place of other

security lighting options.

• Make sure outdoor light fixtures have reflectors, deflectors, or

covers to make more efficient use of the light source and help

reduce light pollution.

• In most applications, use

- Photosensors to turn off lights during daylight hours.

- Motion detectors to activate security or utility lighting

when needed.

- Timers and other controls to turn decorative lighting on

and off.

Insulation Contact (IC) rated recessed

fixtures allow complete coverage of

insulation in attic installations.

○○○○○○○○○○

DEDICATED COMPACT FLUORESCENT FIXTURES

Installing compact fluorescent fixtures that accept only

CFLs ensures lifelong energy-saving benefits. Many new

CFL fixtures offer a dimmable feature and perform much like

incandescent fixtures.

○○○○○○○○○○○○○○○