Full spectrum daylight lamp or Full Spectrum Lighting - Lamp that imitates the actual daylight. Light sources that produce a light spectrum that contains the entire spectrum of visible light (380-700nm), no hesitations in the spectral output, uva and uvb spectrum portions, a colour temperature of ± 5500K and a minimum 95+ CRI.

Colour rendering Index - CRI or RA. An international method used to measure the quality of light and to assess the ability of the lamp to display colour of objects. The higher the CRI, the more colourful the objects are illuminated. The value of artificial light is between 70 (bad) to 100 (real daylight).

Colour Temperature - The colour temperature of a light source for white light is defined as the temperature of a black body whose radiated light gives the same colour impression as the actual light source. The coloru temperature is usually expressed in Kelvin (K). Lamps lower than 5000 kelvin tend more to yellow (warm white lamps) Lamps of more than 6000 kelvin tend towards a blue / green light. Daylight colour is considered better for visual tasks. Daylight in Europe has a colour temperature of ± 5500 kelvin.

Lumen  - The lumen (symbol: lm) is the luminous unit. That is the amount of light emitted by a particular light source. For example: a flame of a candle causes 10 lm while a 36W TL lamp causes ~ 2300 lm.

Lux - The lux (symbol lx) is a unit of illuminance: 1 lux is the light intensity produced by 1 candela on a surface perpendicular to the light rays at a distance of 1 meter from the source. So much higher the lux, so much more light produces the light source over a certain area. 1lx = 1lm / m²

Phosphorus - An inorganic chemical product located on the inside of the glass of a fluorescent lamp. It is intended to absorb and convert the short rays of UV radiation and radiate backward as visible light.

Light flashes - Refers to fast repeated changes in light intensity. This is caused if the applied voltage. 50 Hz  can be seen as unstable light. The use of high frequency electronic ballast (20.000 Hz or higher) results in  reduction of associated complaints.

Seasonal Affective Disorder- Better known as winter depression or winterblues, describes the symptoms as feelings of sadness and lethargy, increased appetite and insomnia. This can be treated with good light therapy.

Light therapy, Phototherapy - It consists of exposure to daylight, or to specific parts of light rays, or exposure to very bright, full-spectrum daylight. Light therapy has already been proven to treat a number of conditions such as depression, sleep disorders, skin disorders, neonatal icterus, jet lag and seasonal affectivity disorders. It is important that this happens with full-spectrum lamps to be working.

Spectrometer - Specially designed instrument to investigate the spectrum of a light source. Similar to prism goggles in which the white light is dispersed in the rainbow colors of the optical spectrum.

Edison Screw - Worldwide used fitting. The standard lamp screw fitting is 27 mm in diameter. The smaller lamp is 14 mm in diameter and is specifically used for smaller decorative fittings.

T5 fitting (or G13 fitting) -  lamps that are five-eighth of an inch (16 mm) in diameter.

T8 fitting (or G5 fitting) - lamps that are eight eighth of an inch (26 mm) in diameter.

Tri-Phosphorus - Although the invention of the tri-phosphor lamps can be seen as a progress compared to the older standard fluorescent lamps, they use poorly 3 phosphorus instead of at least 7 as in the full-spectrum daylight lamps are common. Trifosofor lamps usually get a  low CRI of 70.

Vitamin D - Vitamin D is for the most part taken from daylight. Its synthesis in the human body is triggered by daylight (specifically by UV-B rays) on the skin. Vitamin D plays a very important role in our body. Fullspectrum daylight lamps provide a replacement for sunlight.