Product Details
Knog Frog Head Bike Light 40 Lumens Rechargeable
A design that millions of riders around the world have come to love. Powerful enough for everyday commuting or used to complement an exisiting lighting set-up.
Designed with Chip on Board LED technology, enabling a high intensity light that's compact, low profile and packed with features.
- 40 lumen output
- Low battery indicator - the strap hook will glow red
- Integrated flexible mounting system
- 9 Modes
- Water resistant with IP65 rating
- Lightweight 20 grams
- USB-C rechargeable
- Curved lens provides side illumination
- Up to 80 hour runtime
- Simple one-button operation
- H: 80 mm x W: 35 mm x L: 42 mm
- A full charge is achieved in just 3 hours
| MODE | LUMENS | RUNTIME |
| High | 18 | 4hrs |
| Low | 3 | 20hrs |
| Side Flash | 27 | 5hrs |
| Full Bright | 40 | 20hrs |
| Back To Front | 12 | 10hrs |
| Front To Back | 17 | 8hrs |
| Side To Side | 17 | 7hrs |
| Rotation | 17 | 18hrs |
| Eco | 10 | 80hrs |
What Sets Alchemy Apart
The best pre-owned bikes
When you buy a pre-owned bike from Alchemy Cycle Trader, you’re getting more than just a great deal. Every bike is roadworthy certified, comes with a 3-month warranty, and includes your first service free - so you can ride away with complete confidence.
Buy with confidence
In-house Active Thermography Carbon Fibre Testing for extra peace of mind on pre-owned bikes.
Learn more about our carbon testing.
Expert Servicing & Ongoing Support
Our professional workshop team is here to keep your bike running at its best long after you’ve taken it home. From routine servicing to performance tuning, our qualified mechanics ensure your ride stays smooth, safe, and ready for every adventure. Whether it’s your first free service or future maintenance, you can count on Alchemy Cycle Trader for trusted support and expert care. Learn more about our workshop services.
