Greenlight Europe. How excellent Lighting Maintenance can play its part in helping to reduce global CO2 emissions. Consider this…. Lighting represents 20% Irish electricity consumption and therefore energy-efficient lighting schemes can help to reduce costs. In retail it can be up to 40%.
How excellent Lighting Maintenance can play its part in helping to reduce global CO2 emissions
When did you last look at your lighting installation?
If this cannot be achieved, the designer must clearly state the assumed maintenance programme used to calculate and justify the value of initial illuminance. In turn, this will influence the electrical load and therefore the electricity cost. It will also influence the capital cost.
Maintenance includes replacement of failed or deteriorated lamps and control gear, the cleaning of luminaires and cleaning and redecoration of room surfaces at suitable intervals.
When designing for maintained illuminance the proposed lamp replacement procedure must be considered at the initial design stage of the installation.CIBSE Guidelines 1994Maintenance of Lighting Installation
Change in light output
Probability of lamp failure.
For majority of installations the most sensible procedure is to replace all the lamps at planned intervals-
Group replacement has visual, electrical and financial advantages over the alternative ‘spot’ replacement.
Visually- installation has uniform appearance.
Electrically---- reduces the risk of damage to control gear caused by faulty operation of lamps nearing end of life.
Financially---- arrange replacement when it causes minimum disturbance to interior, tie-in with luminaire cleaning.CIBSE Lighting Guidelines 1994Lamp Replacement
PLANNED LIGHTING MAINTENANCE
1. AVERAGE RATED LIFE
1. Uneven light levels
1. Uniform Light levels
2. Never Optimum light level
2. Optimum light level achieved
3. Increased control gear failure
3. Minimal lighting failures
4. Ineffective Use of Energy
4. Effective Use of Energy
5. Safety implications
5. Designed task levels
6 Lamp disposal problems
6. Compliant lamp disposal
7. Disruption to workplace
7. Planned non-disruptive
8. Uncontrolled costs
8. Budgeted costs
But good lighting needs good maintenance...
Dust Reflects light within Clean mirrored surface reflects
luminaire, which reduces maximum light downwards and minimises
downward light output and glare from luminaire in VDU screens
creates glare in VDU screens thereby retaining CAT 1/2 classification
Before Cleaning After Ultrasonic Cleaning
Why Use Lighting Controls ?
Controls for Comfort and Flexibility
Industry & Warehousing
Alone does not always produce savings
Should not be ‘imposed’ on the user
Use to enable/disable presence detectors
Typical uses: Retail, Industry, Signage
Use in combination with other controls
Infra Red - avoid the cost of switch drops
PIR/Ultrasonic or Microwave ?
Sensor responses vary wildly Think about the user of the space !
External control - car parks, amenity lighting
Solar threshold switching - warehouses, malls, atria
Daylight dimming - offices, retail, hospitals, schools.
More Intelligent Sensors - combining lighting with heating,
Integration of Building Systems
Control Bus Wars
Exploitation of the Internet/Intranet protocols,
Local Room Control