"unnecessary lighting" is a correct and usable phrase in written English.
It refers to lighting that is not needed or required. You can use it in a sentence when describing a situation where there is too much lighting or when discussing the removal of lighting that is not needed. Example: "Due to the high cost of electricity, the company decided to remove all unnecessary lighting in the office building."
The underground will implement a range of energy-saving initiatives including switching off escalators during non-peak times and turning off unnecessary lighting.
Conservation means things like revised building codes, more stringent fuel-economy standards, investment in more efficient transportation options, and doing things such as adjusting thermostats and reducing wasteful use of energy like unnecessary lighting.
The expert's verdict Dr Garry Felgate from the Carbon Trust: Dave's environment at work is fairly typical: unnecessary lighting, computers left on standby and no individual control over heating.
Although nighttime lighting has seldom been a priority of environmentalists — one of whom described it to me recently as a "soft" issue — bad or unnecessary lighting not only wastes billions of dollars' worth of energy every year but also can wreak havoc on ecosystems.
In addition, automatic switches can be used to turn off unnecessary lighting (e.g., rear lamps) when DRLs are energized.
Nationally, unnecessary lighting wastes as much as $10 billion every year.
Janitors are supporting their efforts by team cleaning and turning off unnecessary lights.
Right away, the arena's office workers began turning off unnecessary lights and computers.
At Opower we've seen the results, with families worldwide starting to turn off unnecessary lights and turn down the heat when they leave home.
Last week the company updated its main "f" logo, flattening the icon and removing an unnecessary light blue bar along the bottom.
The unnecessary lights and sirens that Pruitt requests for his motorcade mirror the necessary ones that the president doesn't even have to demand.
