Knog Cobber Big vs Sigma Buster 1100
Comparison 2026 — Bike Lights
Our verdict
Based on our weighted scoring, the Knog Cobber Big edges out the Sigma Buster 1100 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 Buster 1100 remains a sensible alternative if price is your main concern — it lands at €74.95 versus €49.95.
Brightness winner
Sigma Buster 1100
12% higher than its rival
Value winner
Knog Cobber Big
4% better value for money
Specifications
| Specification | Knog Cobber Big | Sigma Buster 1100 |
|---|---|---|
| Price | €49.95+50% | €74.95 |
| Rating | ★4.5 (2,140) | ★4.5 (1,210) |
| Overall | 80/100+3% | 78/100 |
| Lighting | ||
| Brightness | 170 lumen | 1100 lumen+547% |
| Beam angle | 330° | — |
| Modes | 8 (incl. steady)+60% | 5 |
| Certification | — | CE (geen StVZO) |
| Battery | ||
| Type | USB-C Li-ion | USB-C Li-ion, snellaad |
| Runtime | 3 u (hoog) / 50 u (eco)+100% | 1,5 u (1100 lm) / 3,5 u (500 lm) |
| Charge time | — | 2,5 u |
| Properties | ||
| Weight | 39 g+279% | 148 g |
| Waterproof rating | IP67+1240% | IPX5 |
| Mount | Siliconen band | Stuur + helm meegeleverd |
Pros and cons
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
Sigma Buster 1100
Pros
- 1100 lumens — enough to light pitch-black forest 50 metres ahead
- Helmet mount AND bar mount included
- USB-C fast-charge (2.5 hours empty-to-full)
- Aluminium heatsink prevents throttling on long rides
Cons
- No StVZO approval — legally dubious in the Netherlands as sole front light
- Just 1.5 hours runtime on full power