Blackrock Investments

Lighting consumes a significant amount of electricity for a multi-story building. The 13 story building had, what was considered, efficient T5 fluorescent fittings. With a 24/7 run time totalling 8760h/year, the existing fittings used 904,032kWh per year. The £0.105/kWh electricity rate resulted in a lighting cost of £94,923 per year, and estimated annual lamp/ballast replacement maintenance costs of £24,480.

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