Energy-efficient lighting reduces the amount of electricity required to produce the same amount of light, leading to lower energy consumption.

LEDs are the most energy-efficient lighting technology, consuming up to 85% less energy than incandescent bulbs and lasting significantly longer.

Energy-efficient lighting reduces the demand for electricity, which in turn reduces the need for fossil fuel power plants to generate electricity. This leads to lower greenhouse gas emissions, which contribute to climate change.

Luminous efficacy is the measure of how efficiently a light source converts electrical energy into visible light.

Energy-efficient lighting typically requires less maintenance than traditional lighting technologies, as they last longer and are less prone to failure.

Lumen depreciation refers to the decrease in light output from a light source over its lifetime.

Room size does not directly affect the energy efficiency of a lighting system, as it is more related to the amount of light required for a given space.

Color rendering index (CRI) is a measure of how well a light source renders colors compared to a reference light source.

Time clocks are not typically considered to be energy-efficient lighting controls, as they do not respond to changes in occupancy or ambient light levels.

Beam angle is the angle at which light is emitted from a light source, which affects the distribution of light in a space.

Energy-efficient lighting typically requires less maintenance than traditional lighting technologies, as they last longer and are less prone to failure.

Luminous intensity is the measure of the amount of light emitted by a light source in a specific direction.

Incandescent bulbs are not considered to be energy-efficient lighting technology, as they consume a significant amount of energy and produce a large amount of heat.

Illuminance is the measure of the amount of light that falls on a surface.

Cost is not typically considered to be a factor when choosing energy-efficient lighting, as the long-term savings in energy costs often outweigh the initial investment.