Most traditional halogens have a beam angle of around 60 degrees. Beam angles for LED replacements options can vary significantly. The most common beam angles in LED downlights, floodlights and highbays are generally between 100 to 120 degrees.
What is a beam angle?
It is simply the angle at which the light leaves the fitting. The wider the beam angle, the greater the spread of light in the area. The trade-off is that the wider beam angle, the less light hits the ground or desired surface. Therefore, it is important to ensure that the right beam angle is chosen.
If you purchase a new globe or fitting that has a much narrower beam than your current lighting, you may end up with dark spots in your room and bright spots directly under the new fittings.
The below is a nice example of the differences in lighting outcomes between a narrow beam and wider beam light.
Lights classified as narrow beam have a beam angle of 60 degrees or less, or at least have an option for an angle below or equal to 60 degrees.
Narrow beam lights are identified by the symbol:
Different techniques are used for accentuating two and three-dimensional objects.
Three-dimensional objects are generally illuminated from each side. It is also common practice to use a combination of narrow and wide beam angles to bring out a feature of the object or simply create a dramatic scene.
The most common beam spread used for accenting are 10 to 30-degree beam angles.