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

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.

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.

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!

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).

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