Risposta rapida: 24° vs 36° — Qual è meglio?

• fascio di 24° → maggiore intensità, illuminazione focalizzata, contrasto più forte
• Fascio di 36° → copertura più ampia, migliore uniformità, meno apparecchi

• A 3m di altezza, 36° copre ~50–70% di area in più rispetto a 24°

  Conclusione:
  Utilizzo 24° per illuminazione d'accento, e 36° per illuminazione generale nella maggior parte dei progetti commerciali.

Punti Chiave

• 24° = alta intensità luminosa + forte concentrazione
• 36° = copertura ampia + migliore uniformità
• 24° migliora la visibilità del prodotto
• 36° riduce la quantità di apparecchi
• Miscelare entrambi dà i migliori risultati

Perché 24° e 36° sono gli angoli di fascio più utilizzati

Realtà in loco

In ambienti commerciali (vendita al dettaglio, ospitalità):

• le altezze del soffitto generalmente variano 2,5–4 m
• il tempo di installazione è limitato

• l'approvvigionamento deve essere standardizzato

  24° e 36° sono le opzioni più pratiche e ampiamente disponibili.

Spiegazione tecnica

Secondo le classificazioni IES dei fasci luminosi:

• 24° → fascio spot (<30°)

• 36° → fascio stretto (30–40°)

  Riferimento:
  https://www.ies.org/standards/

Questi angoli offrono un equilibrio ottimale tra:

• intensità luminosa
• area di copertura
• flessibilità di spaziatura

Prospettiva diretta dalla fabbrica

In grandi progetti di ospitalità:

• oltre 60% degli ordini sono 24° o 36°
• a causa della compatibilità con sistemi a binario e controlli di attenuazione

24° vs 36°: Differenze chiave a colpo d'occhio

Shadow Quality: A Key Visual Difference

Beam angle affects not just brightness—but how objects look.

• fascio di 24° → sharp, defined shadows
• Fascio di 36° → soft, diffused shadows

Practical impact:

• 24° → ideal for jewelry, watches, textured materials

• 36° → better for clothing, hospitality, ambient lighting

  Key insight:

Narrow beams create depth and contrast, while wider beams improve visual comfort.

Beam Diameter Formula (Design Tool)

Beam Width Calculation

Beam width = 2 × mounting height × tan(beam angle ÷ 2)

Example (3m ceiling)

• 24° → ~1.27m diameter

• 36° → ~1.95m diameter

  36° provides significantly larger coverage.

Reference (photometric testing):
https://www.ies.org/standards/lm-79/

Beam Spread Comparison (Coverage Difference)

Key insight:

Small changes in beam angle create large differences in lighting distribution.

Lux Comparison: Which One Is Brighter?

With identical lumen output:

• 24° → concentrated → higher lux
• 36° → spread → lower lux

Example (800lm @ 3m)

• 24° → ~1800 lux
• 36° → ~900 lux

CBCP (Center Beam Candle Power)

CBCP measures the peak intensity at the center of the beam.

• 24° typically delivers 30–50% higher CBCP

• creates stronger visual focus

  In retail lighting, higher CBCP makes products stand out more clearly.

Riferimento:
https://cie.co.at/publications

Spacing Differences in Real Installations

Based on IES guidelines:
https://www.ies.org/handbook

Practical impact:

• 36° reduces fixture count by 30–40%
• lowers installation and wiring cost
• improves overall uniformity

Warning: Beam Angle vs Ceiling Height

If ceiling height exceeds 3.5m:

• 36° beams may not deliver sufficient lux
• lighting becomes flat and underpowered

Recommendation:

• Utilizzo 24° or narrower beams
• especially for accent or vertical lighting

This is one of the most common mistakes in commercial projects.

Manufacturer Insight: Common Real-World Mistake

In many retail projects:

Clients choose 36° beams to reduce fixture quantity.

Risultato:

• poor contrast
• weak product focus
• reduced visual impact

Our recommendation:

• Utilizzo 24° beams for key areas
• combine with 36° for ambient lighting

Glare Control Consideration

• 24° beams usually offer better glare control

• 36° beams may produce more spill light if optics are poor

  High-quality lens design is critical.

When to Use 24° Beam Angle

Use 24° when you need:

• accent lighting
• high contrast
• focused illumination

Applications:

• retail displays
• artwork lighting
• reception areas

Target: >1000 lux

When to Use 36° Beam Angle

Use 36° when you need:

• general lighting
• uniform distribution
• fewer fixtures

Applications:

• corridors
• hotel lobbies
• open commercial areas

Target: 500–800 lux

Application Note (Fixture Selection)

In higher ceilings (4–6m):

• larger fixtures like AR111
• combined with fascio di 24°

provide better intensity than standard GU10 lamps.

Real Project Examples

Retail

• 24° → product focus
• 36° → background

Hotel Lobby

• 36° grid for floor
• 24° for architectural features

Gallery

• 24° per opere d'arte
• 36° for ambient

Combining both angles delivers optimal results.

Common Mistakes When Choosing Beam Angles

• Using 36° for high ceilings
• Using only one beam angle
• Ignoring spacing rules
• Not simulating lighting

Solution:

• use Dialux / Relux
• verify beam angle before installation

FAQ: 24° vs 36° Beam Angle

Which is better for 3m ceiling?

36° for general lighting.

Is 24° too narrow?

No — ideal for accent lighting.

Can I mix 24° and 36°?

Yes — standard professional approach.

Which saves more cost?

36° reduces fixture count but may reduce lighting quality.

Inventory Strategy for Distributors

For general commercial demand:

• 60% → 36° beam (general use)
• 40% → 24° beam (accent use)

This mix:

• reduces stock risk
• covers most applications
• improves turnover

Final Recommendation: How to Choose

• Need focus → choose 24°
• Need coverage → choose 36°
• Need both → combine both

Engineering Insight

In real projects:

• mixed beam strategy reduces cost by 20–30%
• improves lighting performance
• minimizes rework

Conclusion: Business Value

Choosing the right beam angle:

• reduces installation cost
• improves lighting quality
• avoids rework
• enhances long-term performance

24° = precision lighting tool
36° = efficiency lighting tool

Planning a commercial lighting project?

Our engineering team can help you:

• select beam angles
• optimize spacing
• simulate lighting

to avoid costly mistakes before installation.