Take a Step into the Technical World of Light!
Luminous Flux
Definition: It is the unit that measures the total amount of visible light emitted by a light source.
Unit: Lumen (lm)
Example Use: The luminous flux of a light bulb of 800 lumens refers to the total amount of visible light it emits.
Illuminance (Illumination Level)
Definition: It measures the amount of luminous flux reflecting on a given surface.
Unit: Lux (lx).
Example Use: A 300-500 Lux is recommended in an office to ensure that the working surfaces have sufficient level of lighting.
Luminous Intensity
Definition: It measures the amount of light emitted by a light source in a certain direction.
Unit: Candela (cd).
Example Use: The luminous intensity of a flashlight focused on a certain point is expressed in candela.
Luminance (Parlaklık)
Definition: It measures the intensity of light emitted or reflected from a surface.
Unit: Candela/square meter (cd/m²).
Example Use: The luminance of computer screens is expressed in candela/square meter.
Color Temperature
Definition: It is the measure that describes the color appearance of a light source, and usually expressed in Kelvin (K).
Unit: Kelvin (K).
Example Use: Daylight has a color temperature between about 5000-6500K.
CRI (Color Rendering Index)
Definition: It is the unit that measures how a light source shows the colors close to reality.
Unit: An index between 0-100.
Example Use: The light sources with a high CRI value (90+) show the colors more accurately and naturally.
Beam Angle
Definition: It determines the angle at which a light source is emitted.
Unit: Degree (°).
Example Use: LED lamps with a wide beam angle (120°) are used to illuminate large areas.
Lux (lx)
Definition: It is the unit that measures the level of illumination and is the amount of lumens per square meter.
Example Use: The ideal lighting level in the reading areas is about 500 lux.
Lumen (lm)
Definition: It is the unit that measures the luminous flux.
Example Use: It indicates the total amount of light emitted by a light bulb.
Candela (cd)
Definition: It is the basic unit that measures the light intensity.
Example Use: It refers to the brightness of the light source in a certain direction.
Correlated Color Temperature (CCT)
Definition: It describes how a light source is perceived by the human eye.
Unit: Kelvin (K).
Example Use: It defines the difference between warm white light (2700-3000K) and cold white light (5000-6500K).
PMMA (Polymethyl Methacrylate)
Definition: Polymethyl methacrylate, also known as acrylic or plexi glass, is a transparent thermoplastic polymer that can be used instead of glass.
Area of Use: Lighting fixtures, optical lenses, screens, aquariums and automotive industry
Features: High transparency, impact resistance, UV resistance and light weight.
Contrast
Definition: It refers to the brightness difference between the brightest and darkest points of an image.
Area of Use: It is used in televisions, monitors, projectors and printing technologies.
Features: A high contrast ratio provides more vivid and clear images.
Ultraviyole (UV)
Definition: A section of the electromagnetic spectrum, which has a wavelength shorter than visible light, but longer than X-rays.
Area of Use: It is used in sterilization, medical applications, safety signs, industrial processes and lighting technologies.
Features: Fluorescent effects and the ability to kill microorganisms.
Diffuser
Definition: A material that distributes light and provides homogeneous illumination.
Area of Use: LED lighting, photo studios, screens and indoor lighting.
Features: It hides the light sources, reduces glare and provide a uniform illumination.
Wavelength
Definition: The distance between two consecutive wave peaks or two wave troughs of electromagnetic waves.
Unit: Meters (m) are usually expressed in nanometers (nm).
Example Use: The visible light spectrum varies between 380 nm and 750 nm. The light at a wavelength of 700 nm is detected as red, while the light at a wavelength of 400 nm is detected as blue.
Electromagnetic Spectrum
Definition: It is a continuous spectrum that covers all wavelengths of electromagnetic radiation. This spectrum covers various wavelengths, ranging from radio waves to gamma rays.
Unit: It is expressed in meters (m), nanometers (nm), micrometers (µm) and other units of length.
