Reviews & Ratings
Fahrradbeleuchtung-Info on YouTubeabout 13 hours ago
00:25:19
The reviewer compares the Sofirn BS01 bicycle light to the Lumintop B01 and Busch & Müller Core 2. He notes it's a budget light (around €30) with a replaceable standard 21700 battery, USB-C charging, and multiple brightness modes. However, he criticizes its significant brightness drop over time, non-STVZO certification, and less-than-ideal beam pattern for distance vision.
AI Summary
Pros
- Affordable (around €30)
- Replaceable standard 21700 battery (5000mAh)
- USB-C charging port
- Multiple brightness modes (4 levels) including boost mode
- Good near-to-mid range illumination
- IP65 waterproof rating
- Clear cut-off line to reduce glare
- Better mounting system (Garmin-style mount) compared to Lumintop
- Better user interface than newer Lumintop version
- Battery level indicator (green/red/blinking red)
- Can be used while charging
Cons
- Brightness drops significantly over battery life (not constant)
- Boost mode only lasts a few minutes
- Lower efficiency than Lumintop (less total light output from same battery)
- Not STVZO certified
- Poor distance vision compared to STVZO lights like Busch & Müller
- Highest intensity point in beam is too low, compromising distance vision when aimed to avoid glare
- Cool white LED (around 6500K) which some may prefer neutral white
- Sometimes flickers in high modes when charging
- Battery replacement requires removing 4 small screws (inconvenient on-the-go)
- Measured maximum brightness (1400 lumens) lower than claimed 2000 lumens
- Lux value (50 lux in non-boost modes) is low for distance vision
Key Points
- 2000 lumen claimed output (reviewer measured ~1400 lumens)
- 5000mAh 21700 battery (standard, replaceable)
- IP65 waterproof rating
- USB-C charging
- 4 brightness levels + boost mode
- Boost mode measured at 180 lux (for few minutes)
- Non-boost modes measured at 50 lux
- Cool white LED (~6500K)
- Garmin-style mounting system
- Battery indicator shows: green (>50%), red (25-50%), blinking red (<25%)
- Auto mode activates with triple click (turns on with motion, off after 30s stillness)
Purchase
Where to Buy
Sofirn BS01 Bicycle Light IP65 Waterproof 2000LM Bike 5000mAh Battery Flashlight USB Charging Brightness Adjustment MTB Light
aliexpress.com#1005006049647518Affiliate · MyBikeParts
🇺🇸$44.52
🇫🇷€33.39
🇬🇧£30.99
4.9 (71)
Checked about 3 hours ago
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