Sigma Aura 80 USB vs Knog Cobber Big
Comparison 2026 — Bike Lights
Our verdict
Based on our weighted scoring, the Knog Cobber Big edges out the Sigma Aura 80 USB with an overall score of 80/100 against 78/100. It scores particularly well on brightness (84/100) and battery life (80/100), making it the better all-round pick in Bike Lights.
The Sigma Aura 80 USB remains a sensible alternative if price is your main concern — it lands at €34.95 versus €49.95.
Brightness winner
Knog Cobber Big
8% higher than its rival
Value winner
Sigma Aura 80 USB
14% better value for money
Specifications
| Specification | Sigma Aura 80 USB | Knog Cobber Big |
|---|---|---|
| Price | €34.95+43% | €49.95 |
| Rating | ★4.4 (1,560) | ★4.5 (2,140) |
| Overall | 78/100 | 80/100+3% |
| Lighting | ||
| Brightness | 80 lux | 170 lumen+113% |
| Certification | StVZO, CE | — |
| Beam angle | — | 330° |
| Modes | — | 8 (incl. steady) |
| Battery | ||
| Type | USB Li-ion | USB-C Li-ion |
| Runtime | 4 u (hoog) / 15 u (eco)+33% | 3 u (hoog) / 50 u (eco) |
| Properties | ||
| Weight | 73 g | 39 g+87% |
| Waterproof rating | IPX4 | IP67+1575% |
| Mount | Siliconen snelkoppeling | Siliconen band |
Pros and cons
Sigma Aura 80 USB
Pros
- 80 lux output — more than enough for unlit cycle paths
- StVZO approved: no dazzling of oncoming traffic
- USB rechargeable with up to 15 hours runtime in eco mode
- Quick-release mount for easy removal to prevent theft
Cons
- Micro-USB instead of USB-C (outdated connector)
- No daytime running light mode available
Knog Cobber Big
Pros
- 330° visibility — you're seen from the side at junctions too
- USB-C charging port (Knog finally caught up)
- 170 lumens, bright enough for daytime riding
- Silicone housing — no fragile hinges or brittle clamps
Cons
- Flash modes are not legal as sole rear light in the Netherlands
- Silicone strap wears after 2-3 years of daily use