T2M vs T3M vs T4M: How to Choose LED Street Light Lenses for different projects | DLD Light

Why Lens Selection Matters in LED Street Lighting

The lens of an LED street light determines light distribution, uniformity, and glare control. Choosing the wrong lens can lead to:

• Poor visibility and safety risks
•  Uneven lighting with dark spots
•  Energy waste due to inefficient light spread
•  Non-compliance with road lighting standards (e.g., EN13201)

Understanding T2M, T3M, and T4M Lenses

1. T2M Lens – Medium Beam (60°-90°)

• Best for: Narrow roads, residential streets, and bike lanes

• Light Spread: Balanced distribution with moderate distance coverage

• Advantages: Reduces glare, ideal for low-speed traffic areas

• Common Applications:

  • Neighborhood roads

  • Parking lots

  • Pedestrian pathways

2. T3M Lens – Wide Beam (90°-120°)

• Best for: Medium-width roads and urban streets

• Light Spread: Wider coverage with good uniformity

• Advantages: Minimizes dark spots, suitable for higher-speed roads

• Common Applications:

  • City streets

  • Collector roads

  • Commercial zones

3. T4M Lens – Extra-Wide Beam (120°-150°)

• Best for: Highways, expressways, and large-area lighting

• Light Spread: Maximum coverage with long-distance visibility

• Advantages: Ensures safety for high-speed traffic, reduces the number of poles needed

• Common Applications:

  • Highways & freeways

  • Industrial areas

  • Large parking facilities

Key Factors in Lens Selection

1. Road Width & Layout – Match the lens angle to the road’s dimensions.

2. Traffic Speed – Wider beams (T4M) for high-speed roads, narrower (T2M) for slow zones.

3. Pole Height & Spacing – Affects light spread and uniformity.

4. Regulatory Compliance – Ensure the lens meets local lighting standards.

DLD Light's Custom LED Street Light Solutions

As a trusted OEM LED street light supplier, DLD Light offers:

• Multiple lens options (T2M, T3M, T4M) for different road types
•  Customizable optical designs for specific project needs
•  Smart lighting integration (dimming, motion sensors)
•  Certification support (CE, RoHS, ENEC)

DLD Light Co.,Ltd 
Email: inquiry@dldlight.com
Tel: 0086-0755-21000499
Mob/Whatsapp/Wechat: 0086-19147822839
Web: www.dldlight.com