In lighting design, the beam angle refers to the angle at which light is distributed from a light source or fixture. It determines the spread of light and how it illuminates a space, object, or surface. The beam angle is a critical factor in achieving the desired lighting effect, whether it's for task lighting, ambient lighting, or accent lighting.

Key Concepts of Beam Angle:
1.Narrow Beam Angle (10°–25°):
- Creates a focused, concentrated pool of light.
- Ideal for accent lighting (e.g., highlighting artwork, architectural features) or task lighting (e.g., reading, cooking).
- Works well in spaces with high ceilings or when precise illumination is needed.
2.Medium Beam Angle (25°–45°):
- Provides a balance between focus and spread.
- Suitable for general lighting in smaller rooms or accent lighting for medium-sized objects.
- Often used in track lighting or recessed fixtures.
3.Wide Beam Angle (45°–60° or more):
- Offers broad, even illumination.
- Perfect for ambient lighting in larger spaces or rooms with low ceilings.
- Commonly used in pendant lights, chandeliers, or floodlights.
4.Very Wide Beam Angle (60°–120° or more):
- Creates a diffuse, widespread light.
- Used for large area lighting, such as outdoor spaces, warehouses, or open-plan rooms.
- Object or Area to be Lit
- Small Objects: Use a narrow beam angle (10°–25°) for precise highlighting.
- Large Areas: A wider beam angle (40°–60°) ensures broader coverage.
5. Fixture Placement
- Recessed Lighting: Narrower beam angles (10°–25°) are often used for focused lighting.
- Track Lighting: Adjustable fixtures with medium beam angles (25°–45°) are versatile for accent or task lighting.
- Pendant Lighting: Wider beam angles (40°–60°) are common for general illumination.
6. Desired Aesthetic
- Dramatic Effect: Narrow beam angles create sharp contrasts and focused pools of light.
- Soft, Even Light: Wider beam angles provide a more diffused and uniform look.
7. Light Source and Fixture Type
- LEDs: Often have adjustable beam angles, so choose based on the application.
- Spotlights: Typically have narrow beam angles (10°–25°).
- Floodlights: Usually have wider beam angles (40°–120°).
General Guidelines:
10°–25°: Narrow beam, ideal for accent or task lighting.
25°–45°: Medium beam, suitable for general or accent lighting.
45°–60°: Wide beam, best for ambient lighting.
60°+: Very wide beam, used for large area illumination.

By considering these factors, you can select the appropriate beam angle to achieve the desired lighting effect for your space.