Lighting

Did You Know...

Energy saving bulbs typically use 25% of the energy of normal bulbs, give the same light and last 8 to 12 times longer.

Save 10% to 50%

• Switch off lights. Light switches should be clearly marked indicating which areas they control. Security staff may be able to assist in ensuring that lights are turned off when areas are unoccupied, especially in the evening and at weekends.
  
  
• Maintain and clean light fixtures. Reflectors, roof-lighting and windows should be cleaned regularly to ensure optimum efficiency. Maintenance requirements should be considered when installations are designed, as luminaries that are easily accessible are more likely to be cleaned regularly.
  
  
• Use efficient lamps. T8 (26mm) fluorescents have similar light output compared to the older T12 (38mm) but use eight percent less electricity. Fluorescent tubes should be fitted with appropriate reflectors to maximise light output. High frequency electronic ballasts should be used, as these are 20 percent more efficient than conventional electronic ballasts.
  
  
• Install lighting controls. Use energy-efficient control systems, which include manual switches, occupancy control, time scheduling and daylight responsive control can yield energy savings of between 30% and 50%. Simple payback on any investment can often be achieved in 2 – 3 years.
  
  
• Replace old lamps. The light output of fluorescent lamps decreases over time while still consuming the same power. Lamps should be replaced on a planned bases at the end of their useful life, before light output depreciates beyond acceptable limits.

Energy efficiency tips provided courtesy of Sustainable Energy Ireland