BASIC REQUIREMENTS FOR INDOOR ILLUMINATION DESIGN

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Indoor Illumination Design

A system designed to provide adequate and appropriate lighting for efficient visual task performance.

Illumination Level

Expressed in lux, it represents the amount of light falling on a surface.

Luminous Flux

Measured in lumens, it refers to the total amount of visible light emitted by a source.

Coefficient of Utilization (CU)

The efficiency of the room lighting system accounting for lumen losses due to obstructions.

Total Initial Lamp Lumens

The luminous output of a lamp based on the manufacturer's specifications.

Light Loss Factor (LLF)

A factor representing depreciation in reflectance and lumen output from lamps over time.

Lumen Method Calculation

A standard procedure used to calculate the illumination level in interior spaces.

Room Cavity Ratio (RCR)

A measure used to determine the coefficient of utilization in a room.

Visual Comfort

The feeling of well-being associated with adequate lighting, contributing to higher productivity.

Glare

An uncomfortable sensation caused by bright areas in the field of view.

Directional Lighting

Lighting used to highlight objects, improve appearance, and enhance visibility.

Colour Rendering Index (CRI)

A quantitative measure of a light source's ability to show colors accurately compared to natural light.

Flicker

A fluctuation in light intensity that can cause distraction and physiological effects.

Maintenance Factor

A calculated value that considers how a lighting scheme's performance will change over time.

Daylight Integration

The use of natural light in conjunction with artificial lighting to achieve desired illumination.

Lighting Design Principles

Guidelines that optimize visual comfort, functionality, and aesthetics in illumination.

Task Lighting

Focused lighting meant to illuminate specific areas for activities like reading or cooking.

Energy Efficiency in Lighting

The measure of how much light is produced for each watt of electricity consumed, often assessed through lumens per watt.

Color Temperature

Expressed in Kelvin (K), it indicates the warmth or coolness of light emitted by a source.

Light Distribution

The pattern in which light is emitted from a fixture, affecting the brightness and shadows in a space.

Ambient Lighting

General illumination that provides a uniform level of light throughout a space.

Layered Lighting

A design approach that combines multiple types of lighting to achieve a well-lit environment.

Visual Acuity

The clarity or sharpness of vision, which can be influenced by lighting conditions.

Sustainability in Lighting

The practice of using lighting solutions that minimize environmental impact and reduce energy consumption.

Emergency Lighting

Illumination provided to guide people to safety during power outages or emergency situations.

Illumination System

A combination of lighting elements designed to fulfill specific lighting needs and tasks.

Luminance

The intensity of light emitted from a surface per unit area in a given direction, measured in candelas per square meter.

Light Shelf

A horizontal surface that reflects daylight deep into a room and improves daylight penetration.

Reflectance

The proportion of light that is reflected off surfaces within a space, affecting overall brightness.

Photometrics

The science of measuring light, including intensity, distribution, and color.

Task-Specific Lighting

Lighting designed for particular tasks or activities that require a certain level of illumination.

LED Lighting

Light-emitting diode lighting known for its energy efficiency and longevity compared to traditional bulbs.

Emergency Exit Signs

Illuminated signs that indicate exit routes during emergencies, ensuring safe evacuation.

Lighting Automation Systems

Technology that allows automatic control of lighting based on specific conditions or schedules.

Annual Energy Consumption

The total amount of energy utilized by a lighting system over a year, impacting cost and sustainability.