Tern Light Hermanns MR4 Front

The Tern Light Hermanns MR4 Front (also known as the Herrmans H-Black MR4) is a reliable, entry-level front headlight designed for integrated bike setups. It is a stock or compatible replacement light featured frequently on Tern electric cargo and commuter bikes. 

Key Technical Specifications

• Illumination & Optics: Features a high-performance single LED paired with mirror reflector technology. It outputs approximately 100 to 120 lumens (or up to 40 Lux), giving you a steady, focused beam. 
• Side Visibility: Built with distinctive integrated side windows to ensure you stay visible to cross-traffic from multiple angles. 
• Power Source: Designed as a "set and forget" e-bike component that wires directly into your bike's main battery system, operating smoothly on a 6V to 12V DC range (with some variations supporting up to 48V). 
• Safety Certification: Fully compliant with strict German StVZO regulations, meaning the light beam is directed downward onto the road to prevent blinding oncoming riders or drivers.
• Housing: Features a robust aluminum enclosure that doubles as an efficient heat sink to extend the longevity of the internal electronics.