Why target lighting use?
How can savings be achieved?
Benefits of daylight
Solar Spectrum
Distribution of Light
Definitions and Units of light
energy efficiency of light
luminous efficacy
Typical luminous efficacies
Efficacies are reduced by
Daylight Efficacy Reduction
Electric Light Efficacy Reduction
Strategies for maximising efficiency
Control Problems
Control Solutions
Control Solutions: Photoelectric sensors
Control Savings: Photoelectric sensors
Energy Used - Manual Switching
Energy Used - Photoelectric Control
Energy Used - Photoelectric Control with dimming
steps in a lighting audit
How do we assess the potential for lighting savings?
Determining loadings
Technology identification
Determine Daylight Availability
Daylight Factor
Calculation methods
Maximum Depth Formula
Average Daylight Factor
Guidelines for Average Daylight Factor
Measurement of Daylight Factor
Other Measurements with a light meter
Using Daylight Factor
Predicting Daylighting Hours
Determining Control based Wastage
Walk-around survey
Survey Permutations
Behavioural based assessment
Behavioural based assessment - example
assessing access to daylight
Logical Switching
determine control strategies
Reallocation of Luminaire Banks
determine luminaire efficiencies
Setting a Target 1
Setting a Target 1
Reductions using existing equipment
maintaining success