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Energy efficient lighting advice for your organisation, including guidance on energy-saving LED lighting.

Energy efficient lighting for business

We help organisations ensure their lighting systems are as efficient as possible. Our Lighting technology overview guide introduces the main energy-saving opportunities in this area.

Getting lighting right is important for the energy efficiency of a building and the well-being of its occupants. Up to 40% of a building's electricity use is accounted for by lighting, while the right level and quality of light improves the alertness and accuracy of those working in it.

Ways to improve your organisation's lighting include:

  • Occupancy sensors: By dimming or switching off lighting when there is nobody in a room occupancy sensors can reduce electricity use by 30%.
  • Daylight sensors: Adjusting the artificial lighting according to the amount of natural light in a room using daylight sensors or photocells can reduce electricity use by up to 40%.
  • Maintenance plan: By regularly cleaning windows and skylights you can reduce the need for artificial light. Cleaning the fixtures that contain lamps, known as luminaires, will improve their performance.

Lighting overview guide

CTV049 Lighting technology overview guide

Published December 2017

Lighting is something that most of us take for granted. How often do we question the amount or quality of that light? Or how much it costs to run and maintain? Our 50 page guide sets out to explain the basics of artificial lighting; the equipment, design principles and the effect it has on our work and leisure.

It is intended to inform a wide range of readers about the importance of light; both natural and artificial. In particular, it will help you to understand how to choose artificial lighting equipment that will deliver the most energy efficient solutions without compromising on quality.

A better understanding of good lighting practices helps when considering its direct and indirect costs. A bad lighting scheme is a complete waste of energy and is not sustainable. This guide will explain why and help you to improve the lighting where you work, saving money and carbon.

Guide contents:

  • Introduction
  • Importance of light
  • Understanding light
  • Light & colour
  • Daylight
  • Health and well-being
  • Lamps
  • Control gear
  • Luminaires
  • Lighting controls:
    • overview
    • techniques
    • applications
  • Lighting design
  • Applications
  • Next steps
  • Glossary

Publication date December 2017; Publication code CTV049v2

Information in this report was correct at the time of publication

Download the guide:


Energy efficient lighting: further guidance


Publication date: 2011-2012
Information in these guides was correct at the time of publication


The following publications are available for free download:

Energy efficiency support

The Carbon Trust Green Business Fund offers energy efficiency support and energy assessments for small and medium-sized businesses in England, Scotland and Wales.

If you'd like to improve energy efficiency of your organisation, see our services for small to medium enterprises to find out how we can help.

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