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What are the most common ways to reduce lighting energy use?

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Lighting is one of the major sources of energy consumption in buildings, accounting for about 15% of the total electricity use. Reducing lighting energy use can save money, lower carbon emissions, and improve the quality of indoor environments. In this article, we will explore some of the most common ways to reduce lighting energy use, from choosing efficient lamps and fixtures to optimizing lighting controls and design.

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1 Switch to LED lamps

One of the simplest and most effective ways to reduce lighting energy use is to switch to LED (light-emitting diode) lamps. LED lamps are more efficient than incandescent, halogen, or fluorescent lamps, as they convert more electricity into light and produce less heat. LED lamps also last longer, reducing maintenance and replacement costs. LED lamps come in various colors, shapes, and sizes, and can be dimmable or compatible with smart lighting systems.

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Amresh Ray

ESG I Sustainability l Carbon Market I Energy Efficiency I New & Renewable Energy I Energy and Climate Policy I Business Strategy I Business Development I
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The ways to reduce lighting energy use are following: LED Lighting: Switch to LED bulbs for energy efficiency. Natural Lighting: Maximize daylight to reduce artificial lighting needs. Occupancy Sensors: Automatically turn off lights when rooms are unoccupied. Daylight Sensors: Adjust lighting based on available natural light. Timers and Dimmers: Control lighting levels with timers and dimmer switches. Task Lighting: Illuminate only the area where tasks are performed. Regular Maintenance: Keep fixtures clean and in good working order. Lighting Controls: Use centralized or smart controls for scheduling. Education and Behavior Change: Encourage occupants to turn off lights when not needed.

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Kirby Lee, PE, CEM, CEA, GBE, LEED AP BD-C ????

#1 Best Selling Author: The Lion Attitude | Action+Connection | I+M+P+A+C=T | AEC Leadership Development | Technical Sales Leadership | MEP Engineer & Energy Specialist | 3rd Gen HVAC Construction | Owners Representative
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LED lamps, Occupancy Sensors, and lighting controls and greatly minimize energy usage. This can cut energy densities down to in some cases even below 0.5W/SF. Each of these in a retro fit application is a great opportunity for high return on investment and paybacks in the less than 2 year range in a lot of cases.

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2 Upgrade lighting fixtures

Another way to reduce lighting energy use is to upgrade lighting fixtures to match the performance and quality of LED lamps. Lighting fixtures are the devices that hold and direct the lamps, such as recessed cans, pendants, or troffers. Upgrading lighting fixtures can improve the distribution, uniformity, and appearance of light, as well as reduce glare and shadows. Lighting fixtures can also have integrated sensors, dimmers, or timers that enable more flexible and responsive lighting control.

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Claire O'Reilly

Marketing Director ? B2B Product Innovations and Customer Solutions
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Upgrading to LED fixtures is the way to go! There are multiple reasons why including an LED lighting fixture is designed and manufactured to accommodate the LED light source and required heat sink to deliver efficient & effective light output for the life of the luminaire, resulting in lower total (lifetime) cost. Also, given the higher lumen output of LEDs (compared to traditional), you may be able to reduce the number of fixtures needed. Stacking up all of the energy savings...higher efficacious fixtures = fewer fixtures needed, LED lower power consumption, low heat from the fixtures also reduces building temperature requirements. Want more savings...leverage utility rebates. Win-Win!

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3 Optimize lighting controls

Lighting controls are the systems that regulate the operation and output of lighting fixtures, such as switches, dimmers, sensors, timers, or networks. Optimizing lighting controls can reduce lighting energy use by adjusting the light levels according to the needs and preferences of the occupants, the availability of natural light, or the schedule of the building. Lighting controls can also provide feedback, monitoring, and reporting on the lighting energy use and performance, allowing for further improvements and savings.

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Rohit Nanoty

Head - ESG l Gravita India I Circular EconomyI Sustainable Finance
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Conduct lux monitoring regularly at workplace to see if any areas are receiving greater light than what is expected at that workplace. If found so, some of the lighting fixtures can be reduced and energy usage can be optimised. Also, design of the working space should be such as to ensure maximum usage of daylight/natural light to reduce day time lighting requirement. Third, occupancy sensors can be installed where manpower occupancy is less which will ensure lights are on only if somebody is present in that particular area (examples are switchgears, canteen, meeting rooms, washrooms etc).

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4 Use natural light

Natural light is the light that comes from the sun or the sky, and it can be a valuable source of illumination and comfort for buildings. Using natural light can reduce lighting energy use by reducing the need for artificial lighting during the day, as well as providing health and wellness benefits for the occupants. Natural light can be used through windows, skylights, or light tubes, or enhanced by reflective surfaces, light shelves, or shading devices. Natural light can also be integrated with artificial lighting through daylight harvesting systems, which adjust the electric light levels based on the amount of natural light.

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Madhan kumar S

Manufacturing, Energy, Environment, and Sustainability; Chevening Fellow at Oxford -2023,
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Natural light coupled with mirrors and light colored paint can avoid a lot of lighting load. The inconveniences of inevitable heating is to be addressed through ventilation designs

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5 Design for efficiency

Designing for efficiency is the process of planning and implementing lighting solutions that meet the functional and aesthetic requirements of the space, while minimizing the lighting energy use and impact. Designing for efficiency involves considering the layout, orientation, and use of the space, the characteristics and needs of the occupants, the quality and quantity of light, and the integration of lighting with other building systems. Designing for efficiency can also involve following best practices, standards, or guidelines for lighting design, such as those from the Illuminating Engineering Society or the U.S. Green Building Council.

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6 Educate and engage occupants

Educating and engaging occupants is the strategy of involving and informing the people who use the space about the benefits and methods of reducing lighting energy use. Educating and engaging occupants can increase their awareness, motivation, and participation in lighting energy conservation, as well as improve their satisfaction and comfort with the lighting conditions. Educating and engaging occupants can be done through signage, campaigns, feedback, incentives, or training, or by creating a culture of energy efficiency and sustainability in the building.

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7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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What are the most common ways to reduce lighting energy use?

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1 Switch to LED lamps

2 Upgrade lighting fixtures

3 Optimize lighting controls

4 Use natural light

5 Design for efficiency

6 Educate and engage occupants

7 Here’s what else to consider

Energy Management

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