Definition of light bulb beam angles at LED U.

Common 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 eminates 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:

• VNSP: Very narrow spot
• NSP: Narrow spot
• SP: Spot
• NFL: Narrow flood
• FL: Flood
• WFL: Wide flood
• VWFL: Very wide flood

• Narrow Spot: 05-15 degrees
• Spot: 16-22 degrees
• Narrow flood: 23-32 degrees
• flood: 33-45 degrees
• wide flood: 45+ degrees