Use day lighting effectively by locating work stations requiring good illuminance near the
windows. Minimize illuminance in non- task areas by reducing the wattage of lamps or number of
fittings
Switching arrangements should permit luminaries or rows of luminaires near natural light sources
like windows or roof lights to be controlled separately.
Task lighting saves energy, utilize it whenever possible.
Controls are very effective for reducing lighting cost. Provide separate controls for large
ratings.
Install switching or dimmer controls to provide flexibility when spaces are used for multiple
purpose and require different amounts of illumination for various activities.
Install occupancy sensors for indoor cabin light controls.
Use electronic ballasts in place of conventional ballast for fluorescent lamps.
Separate lighting feeder and maintain the feeder at permissible voltages by using transformers.
Maintenance is very important factor. Evaluate present lighting maintenance program and revise
it as necessary to provide the most efficient use of lighting system.
All surfaces absorb light to some degree and lower their reflectance. Light colored surfaces are
more efficient and need to be regularly painted or washed in order to ensure economical use of
light.
Clean luminaries, ceilings, walls, lamps etc. on a regular basis.
Avoid use of incandescent/tungsten filament lamps. The power consumed by these lamps is 80% more
than the fluorescent/LED lamps for same lumen output.