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Instituto Tecnológico y de Estudios Superiores de Monterrey
Campus Querétaro
LIGHTING EFFICIENCY
Edification & Energy Efficiency
Prof. M. Arch. Susana García-San Román, LEED AP BD+C
LIGHTING BASIC CONCEPTS
What is the difference among:
•INCANDESCENT LAMPS
•FLUORESCENT TUBES
•FLUORESCENT COMPACT LAMPS (CFL)
•HALOGEN LAMPS
•LEDS (LIGHTING EMITTING DIODES)
from the point of view of energy efficiency?
What is the luminous efficacy of each type (lumens/watt)?
LIGHTING BASIC CONCEPTS
LUMINOUS FLUX (lumens) and ILLUMINANCE LEVEL (lux)
HOUSE HOLD LIGHTING POWER DENSITY
(watts/m2) ESTIMATION ACTIVITY
FOR YOUR HOUSE:
1- COUNT LAMPS AND MAKE A LIST SPECIFYING POWER (watts) OF EACH
ONE, ORGANIZED FOR EACH SPACE
2- DETERMINE LUMINOUS FLUX (lumens) OF EACH LAMP BASED ON ITS
EFFICACY
3- ESTIMATE ILLUMINANCE LEVEL (LUX) OF EACH ROOM BASED ON
SQUARE FOOTAGE (LUX = LUMEN / M2)
4- CHECK RECOMMENDATION BY IESNA:
HOUSE HOLD LIGHTING POWER DENSITY
(watts/m2) ESTIMATION ACTIVITY
FOR YOUR HOUSE:
5- ESTIMATE LIGHTING POWER DENSITY (LPD) FOR EACH ROOM
(watts/m2)
6- CHECK COMPLIANCE WITH RECOMMENDED LIMITS OF LPD (NMX-AA-
164-SCFI)
LIGHTING BASIC CONCEPTS
LIGHTING POWER DENSITY (watts/m2)
1- FOR ENERGY MODELING: INTERNAL HEAT GAINS
2- FOR ELECTRICAL BALANCE: PV ARRAY SIZING
LIGHTING POWER DENSITY (watts/m2)
STEP 1: DETERMINE ILLUMINANCE LEVEL IN EACH SPACE
(LUX) BASED ON IESNA (ILLUMINATION ENGINEERS
SOCIETY OF NORTHAMERICA) RECOMMENDATIONS FOR
DIFFERENT TASKS
LIGHTING POWER DENSITY (watts/m2)
STEP 2: DETERMINE LUMINOUS FLUX IN EACH SPACE
(Lumens) BASED ON SURFACE AREA OF EACH SPACE (lux x m2 = lm)
Space 1…
X m2
X lux
X lm
X watts
Space 2…
X m2
X lux
X lm
X watts
LIGHTING POWER DENSITY (watts/m2)
STEP 3: DETERMINE LIGHTING POWER IN EACH SPACE
(watts) BASED ON EFFICACY OF SELECTED LAMPS (lm/watt)
Space 1…
X m2
X lux
X lm
X watts
X watts/m2
LIGHTING POWER DENSITY (watts/m2)
STEP 4: ESTIMATE LIGHTING POWER DENSITY IN EACH
SPACE (watts/m2) AND VERIFY THAT THIS IS BELOW THE
LIMIT LPD ACCORDING TO THE MEXICAN NORM NMX-AA-
164-SCFI
Space 1…
LPD
X watts/m2

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Lighting Efficiency Guide

  • 1. Instituto Tecnológico y de Estudios Superiores de Monterrey Campus Querétaro LIGHTING EFFICIENCY Edification & Energy Efficiency Prof. M. Arch. Susana García-San Román, LEED AP BD+C
  • 2. LIGHTING BASIC CONCEPTS What is the difference among: •INCANDESCENT LAMPS •FLUORESCENT TUBES •FLUORESCENT COMPACT LAMPS (CFL) •HALOGEN LAMPS •LEDS (LIGHTING EMITTING DIODES) from the point of view of energy efficiency? What is the luminous efficacy of each type (lumens/watt)?
  • 3. LIGHTING BASIC CONCEPTS LUMINOUS FLUX (lumens) and ILLUMINANCE LEVEL (lux)
  • 4. HOUSE HOLD LIGHTING POWER DENSITY (watts/m2) ESTIMATION ACTIVITY FOR YOUR HOUSE: 1- COUNT LAMPS AND MAKE A LIST SPECIFYING POWER (watts) OF EACH ONE, ORGANIZED FOR EACH SPACE 2- DETERMINE LUMINOUS FLUX (lumens) OF EACH LAMP BASED ON ITS EFFICACY 3- ESTIMATE ILLUMINANCE LEVEL (LUX) OF EACH ROOM BASED ON SQUARE FOOTAGE (LUX = LUMEN / M2) 4- CHECK RECOMMENDATION BY IESNA:
  • 5. HOUSE HOLD LIGHTING POWER DENSITY (watts/m2) ESTIMATION ACTIVITY FOR YOUR HOUSE: 5- ESTIMATE LIGHTING POWER DENSITY (LPD) FOR EACH ROOM (watts/m2) 6- CHECK COMPLIANCE WITH RECOMMENDED LIMITS OF LPD (NMX-AA- 164-SCFI)
  • 7. LIGHTING POWER DENSITY (watts/m2) 1- FOR ENERGY MODELING: INTERNAL HEAT GAINS 2- FOR ELECTRICAL BALANCE: PV ARRAY SIZING
  • 8. LIGHTING POWER DENSITY (watts/m2) STEP 1: DETERMINE ILLUMINANCE LEVEL IN EACH SPACE (LUX) BASED ON IESNA (ILLUMINATION ENGINEERS SOCIETY OF NORTHAMERICA) RECOMMENDATIONS FOR DIFFERENT TASKS
  • 9. LIGHTING POWER DENSITY (watts/m2) STEP 2: DETERMINE LUMINOUS FLUX IN EACH SPACE (Lumens) BASED ON SURFACE AREA OF EACH SPACE (lux x m2 = lm) Space 1… X m2 X lux X lm X watts Space 2… X m2 X lux X lm X watts
  • 10. LIGHTING POWER DENSITY (watts/m2) STEP 3: DETERMINE LIGHTING POWER IN EACH SPACE (watts) BASED ON EFFICACY OF SELECTED LAMPS (lm/watt) Space 1… X m2 X lux X lm X watts X watts/m2
  • 11. LIGHTING POWER DENSITY (watts/m2) STEP 4: ESTIMATE LIGHTING POWER DENSITY IN EACH SPACE (watts/m2) AND VERIFY THAT THIS IS BELOW THE LIMIT LPD ACCORDING TO THE MEXICAN NORM NMX-AA- 164-SCFI Space 1… LPD X watts/m2