Technical information

Definition of light

What is light?

Light is an electromagnetic (later referred as EM) radiation with a wavelength that is visible to the eye. The visible spectrum is the portion of the EM spectrum that is visible to (can be detected by) the human eye.

EM radiation in this range of wavelengths is called visible light or simply light. There are no exact bounds to the visible spectrum; a typical human eye will respond to wavelengths in air from 400 to 700 nm, from infra red to ultra violet range.

Visible EM spectrum
The combination of these EM waves produces white light, which is what we see from the sun and from most artificial light sources.

Light color

Unit of measurement: Kelvin [K]

The color temperature of a light source is defined in comparison with a “black body radiator” and plotted on what is known as the “Planckian curve” as seen in the figure .

The higher the temperature of this “black body radiator” the greater the blue component in the spectrum and the smaller the red component. An incandescent lamp with a warm white light for example, has a color temperature of 2700K, whereas a daylight fluorescent lamp has a color temperature of 6000.

The light color of a lamp can be neatly defined in terms of color temperature. There are three main categories:

– Warm White <3300 Kelvin

– Cool White 3300 to 5000 Kelvin

– Daylight >5000 Kelvin

Luminous efficacy

Unit of measurement: lumens per watt [lm/]

Luminous efficacy indicates the efficiency with which the electrical power consumed is converted into light.

It is measured in lumens per Watt (lm/W).

The luminous efficacy of conventional incandescent lamps (such as R5 W) is typically 10 lm/W, that of tungsten-halogen lamps (such as H7) 26 lm/W and that of gas discharge lamps (such as D2S) 91 lm/W.

Luminous intensity distribution curve

Luminous intensity distribution curves are typically represented in polar plots, because this format allows us to visualize both the orientation and the light distribution of the light fitting.

The candle power distribution of a light fitting depends upon reflector design, shielding type, and lamp-ballast selection. It is assumed that the light fitting position is at the crossing of two axes (horizontal and vertical), and that 0° (nadir) is beneath the light fitting. Other angles, which represent the various placements of a photocell as it moves in a circular pattern around the light fitting, are marked on the graph as well.

If the distribution of light is not symmetrical in all directions around the vertical axis, such as for a 2ft. x 4ft. light fitting. Candlepower values may be taken in a number of vertical planes through the light fitting. The planes shown in photometric reports are 0°, 22.5°, 45°, 67.5°, and 90°. The planes most commonly used in lighting practice are 0° or parallel to the lamp axes, 90° or perpendicular to the lamp axes, and at an angle 45° to the lamp axes.



Omega -Lite works according to the requirements of ISO 9001 standard. This international standard measuring the quality management system of the company. This standard is used to assess whether the organization is able to meet customer requirements , laws and regulations and the requirements of the organization itself. The map ISO 9001 procedures and regulations bring the activities within an organization.

Omega -Lite ensures that all products are CE marked and / or other third party approvals.

The CE mark signifies that a product conforms with the relevant ECC directives requirements.
The CE mark is compulsory to indicate LVD and EMC conformity.
The CE mark is also a self certification that the manufacturer claims that the product is safe.
The value of such claim is directly related to the standing of the manufacturer.

IP Degree

The IP-encoding is an indication for the degree of protection of the construction. This code is an internationally standardized in IEC 60529 ( International Electrotechnical Commission ). The IP Degree of Ingress Protection are 2 numbers. The first numer is protection against dust and solid objects. The second numer is protection against moisture.