A wider beam.
Spot light beam angle.
Ranging from a very narrow 15 degrees spot to a wider 60 degrees flood.
The beam angle should therefore always be chosen in conjunction with the desired brightness according to the surface to be illuminated.
The spotlight with a beam angle of 60 must illuminate a much larger area with the same light output as the 15 spotlight.
A narrow beam angle makes the light more focused and intense.
This convenient calculator will determine the beam angle the beam spot size or the distance of a beam.
A wider beam angle will distribute the light better to more areas of the room.
The spot size of a flood light bulb is the diameter at any given distance that the bulb illuminates to 50 of the maximum light output.
Lamps such as halogens and some leds come in a variety of angles from 4 degree to 60 degree with some of the larger halogen lamps up to 120 degree.
What you want to know is the area that a flood light will illuminate.
How to use it.
Knowing how to use beam angles correctly can vastly improve the lighting.
Most led lights are available in a choice of beam angles.
Narrow beam angles from a very narrow 15 degree spot to a wider 60 degree flood make the light more intensive and intense.
For this reason the illuminated surface appears larger but also much darker.
Just enter two known values and click the calculate button to calculate the unknown value you are looking for.
For instance if you wish to know the coverage area spot size of a 10 beam mounted 25.
Most led lights are available at selected beam angles.