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Our Lady of Mercy, National School Cahir – Lighting Upgrade

Project Type
Services Involved
Community Energy,

Lighting UpgradeOn behalf of Our Lady of Mercy National School Cahir, Tipperary Energy Agency applied for a SEAI (Sustainable Energy Authority of Ireland) Better Energy Community (BEC) grant in 2015. The grant was sought to improve the quality of light in classrooms using energy efficient lighting and technology while simultaneously reducing the annual energy cost. Standard lighting can account for up to 55% of the electrical energy usage within most educational buildings. Savings of approx. 60% – 70% can be achieved using energy efficient lighting.
Tipperary Energy Agency acted as Project Managers for the duration of the project to ensure works were carried out to the required specification. All major works were carried out during the 2015 summer holidays.

Cahir School consists of:

• 10 classrooms
• Computer room
• Assembly hall
• 2 Offices
• 2 sets of Toilets
• Corridors

Total Number of staff and pupils: 285

Cost – Total cost of the lighting project (after 50% SEAI grant) of the aforementioned rooms was € 10,876

Savings – Proposed savings of € 2,532

Payback – 4.3 years. This will save 8,119Kgs of CO2 per annum and can help with Green Flag benefits.

New technology controls include occupancy sensors where lights are on only when there is someone present in the room. Daylight sensors will dim the light depending on the amount of natural light entering the building and adjusting the light (LUX) level to meet the required standards.

Project Cost €21,752
Potential Annual Savings in KWh 14,897
Annual Savings @ €0.017/KWh €2,532
Pay Back in years 8.6
Pay Back with 50% Grant 4.3
CO2 Saving in Tonnes 8,119


The previous lighting consisted of:









After lighting








You can download the full case study Our Lady of Mercy National School Cahir – Lighting Upgrade Case Study