Light Bulb Beam Angle
Light Bulb Beam AngleCommon terms in selecting a light bulb are 'flood' light or 'spot' light. These are designations of beam angle. The beam angle is the degree of width that light emanates from a light source. Specifically: The angle between those points on opposite sides of the beam axis where the intensity drops to 50% of maximum. Typically a narrow beam angle is a 'spot' of light and a broader beam angle 'floods' an area with light, called a flood light. There are a number of much more specific designations of beam angle. They are not used consistently between all the light bulb manufacturers, but several use this general terminology: Light Bulb Beam Angle Definitions
Smarterlight uses the following designations for describing beam angle:
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