CLSASELF LIGHTING Column shares lighting knowledge, design inspiration, and industry news.
Many people have a vague understanding of beam angles when arranging lighting, leading to various failures. For example: if the spotlight's beam angle is too narrow, it won't create the desired 'hill effect':
In ceiling-less lighting designs, you’ll inevitably face the question of how to pair beam angles. Designers typically select beam angles based on lighting requirements and actual soft furnishing conditions. Choosing the correct beam angle can significantly boost your home’s sense of comfort and happiness!
1. What Is a Beam Angle?
The beam angle is one of the most common parameters for luminaires. It refers to the angle formed between two sides of the main axis of the light beam where the luminous intensity drops to 50% of its maximum. Simply put, the beam angle is the angle at which light reflects outward. The wider the beam angle, the lower the central light intensity and illuminance.
With the same light source: 【The wider the beam angle】the lower the central light intensity, resulting in a softer light spot; 【The narrower the beam angle】the higher the central light intensity, producing a harsher light spot.
2. Applications of Different Beam Angles
1. Narrow Beam Angle (10–20°): Accent Lighting, Highlighting Luxurious Effects
Due to its concentrated central intensity and relatively small light spot, this angle is generally used for accent lighting—ideal for illuminating delicate ornaments or decorative items.
2. Wide Beam Angle (20–40°): Wall Washing or Localized Lighting, Enhancing Depth and Contrast
First, wall washing. Using downlights or spotlights to wash walls creates an illusion of higher ceilings and reduces spatial confinement. If your walls feature artwork or decorative paintings, wall washing can highlight their texture and quality. Second, localized lighting—for instance, in a living room, visual focus usually centers above the coffee table. Installing several surface-mounted or recessed wide-beam-angle fixtures above the coffee table provides effective localized illumination.
3. Extra-Wide Beam Angle (50–60°): Ambient or Localized Lighting, Even Illumination with Refined Texture
An extra-wide beam angle spreads light broadly, dispersing it widely across the floor. This is suitable for providing ambient lighting in spaces where uniform illuminance is needed, though it offers less pronounced lighting layering.
3. Common Questions
Q1: What are the benefits of wall washing?
Wall washing transforms direct lighting into indirect lighting by reflecting light off walls, reducing eye strain and helping protect vision.
Q2: How should spacing be adjusted for different beam angles?
The narrower the beam angle, the closer the fixtures can be spaced. If you're unsure, it’s best to consult a professional lighting designer.
Narrow-beam fixtures offer better anti-glare performance but illuminate a smaller area, creating a strong ambiance at the cost of stark brightness contrasts.
Wide-beam fixtures distribute light more evenly, providing balanced ambient lighting—but they’re less effective at crafting dramatic atmospheres. Therefore, choose beam angles according to your specific space requirements.