Engineering
Neon Flex Bending Radius: Top-Bend vs Side-Bend Rules
July 31, 2026
Minimum bending radius for silicone neon flex, top-bend vs side-bend selection, and how to avoid dark spots on architectural curves.
Neon Flex Bending Radius Guide
Quick Answer: Standard silicone neon flex often requires minimum 50 mm bending radius for top-bend profiles and 80 mm for side-bend profiles. Tighter curves need custom profiles or factory corner modules — exceeding limits damages the internal LED strip.
Top-Bend vs Side-Bend
Always confirm on the datasheet for your exact SKU.
Why Radius Matters
The internal flexible PCB and LED assembly cannot fold like wire — compression on the inner radius cracks traces; overstretch on the outer radius opens solder joints.
Design Strategies for Tight Corners
- Pre-formed factory corners - Cut-and-join with sealed connectors at straight segments - Custom smaller-radius OEM profile (project-specific)
Q: What happens if radius is too tight? A: Dark spots, flicker, or open circuit — often appearing weeks after install under thermal cycling.
Q: Can 3D facade models override datasheet? A: No — validate physical mockups; CAD curves must respect mechanical limits.
Conclusion
Document bend type and minimum radius on shop drawings before bulk order. Mihoray engineering can review PDF elevations for run splits and corner parts.
About Mihoray
Mihoray is a professional LED strip and neon flex manufacturer based in China, providing OEM and ODM lighting solutions for commercial, hospitality, architectural and landscape lighting projects worldwide.
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