Everything on the light opening angle


led lights

We have often talked about the color of light and light intensity, but another very an important factor for obtaining correct lighting in a project, whether it is a large public space, or simply the homeroom, is the ' opening angle of the light or opening of the light beam.

For each lighting product, we will always find the type of light beam or lighting angle indicated and our choice must be calibrated according to the design needs; this is why it is essential to know what it is. Let's see it together:

What is the opening of the light beam?

The opening of the light beam is the luminous angle created by a light source when it reaches a certain surface, it is expressed in degrees that vary from a minimum width of 10 ° up to 120 °, depending on the type of lamp.
Naturally the sharper the emission angle is, the more the light beam will be concentrated on a precise point and therefore it will be more intense, and compared to solutions with a wider opening.

Which angle of light opening to choose

The choice of a lamp is strictly related to the use that will be made of it, it is therefore essential to take into account two fundamental factors: the distance from the light source and the area to be illuminated.
The greater the distance the smaller the opening angle must be since the light intensity is reduced as you move away from the light source. As anticipated, the size of the area to be illuminated is decisive.
If we want to illuminate a small object a smaller angle of opening will be necessary; a closed corner is ideal for focused lighting, for example, to highlight particularly important decorative elements such as a picture, a piece of furniture or a point that you want to emphasize. In this case an optimal result can be obtained with an LED light from 24 to 45 degrees.
If we want to light up a wider area, like an entire room, it is advisable to choose LED lamps with a wide opening, therefore greater than 60 °; in this way we will obtain a diffused and homogeneous light that will not produce shadows.

Examples of use

• 10 ° light beam: it is the narrowest light beam, generally used for accent lighting for specific points, works of art and small decorative objects.
• Light beam between 24 ° and 40 °: it is a medium luminous angle that creates a more widespread type of lighting. Ideal for public spaces such as shops, restaurants and in home environments.
• Light beam over 60 °: A wide light beam, particularly suitable for general lighting in public buildings and offices.

Small practical example

Let's take a small example to better understand the portion of space lit by a lamp based on the two variables:
• Degree of light opening
• Meters of distance between the source and the object to be lit
A lamp with an average aperture of 60 ° placed at 3 meters distance, it illuminates a circular surface whose diameter is 3.46 meters, while at the same distance a light with an opening angle of 15 ° illuminates a surface of about 80 centimeters.
This makes we fully understand the importance of assessing in advance the effect we want to achieve and choose the lamp with the right degree of opening of the light beam.
Also, read and know about The importance of light in a bar or restaurant. 

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