This estimator is designed to provide an estimation of the costs and energy efficiency benefits of upgrading existing lighting to light-emitting diode (LED) lighting on a campus-style site or at an organisational portfolio level.
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This estimator is designed to provide an estimation of the costs and energy efficiency benefits of upgrading existing lighting to light-emitting diode (LED) lighting on a campus-style site or at an organisational portfolio level. Using this estimator also provides a repository of site information to be assembled in a consistent format.
This guidance is produced as part of the development of a consistent approach to assessing decarbonisation for scaled delivery.
This tool can be used standalone or as part of the Public Sector Decarbonisation Guidance feasibility and design process to assess the impact of installing LEDs on a given site's energy usage. It provides an estimation of the financial cost as well as the energy and cost savings to upgrade a site's lighting.
LED lighting will generally pay back well, and within a few years. Where applicable, a lighting retrofit programme for a whole site should be considered, only omitting areas where payback seemed excessive (e.g. >10 years). Note that a proportion of the costs of routinely replacing existing lighting will be saved due to the longer operating lifetime of LED lights. Therefore the frequency of replacement, based on bulb lifetimes and operating hours, and an additional cost of £5/m2 are added to account for the labour and administration costs of routine bulb replacement based on the proportion of total floor area per year.
The power required for existing and LED replacement lighting will depend on the existing lighting level required as well as the existing lighting type. These are input based on the site specific information and form the basis of the estimations provided.
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