




2500LM POWER & 4° ULTRA-FOCUSED SPOT: Engineered with an advanced Luminus SFT42R LED that unleashes 2500 lumens focused into a laser-like 4° narrow beam. Pierces flawlessly through murky underwater environments and significantly reduces backscatter for crystal-clear target spotting.
AUTO-LOCK SAFETY & SMART INDICATOR: Features an ergonomic stainless steel side switch with an Automatic Lock function that engages after 3 minutes of inactivity to prevent accidental activation in your gear bag. Integrated with a real-time LED power indicator for clear battery tracking.
PREMIUM LG CELL & 7H RUNTIME: Driven by a high-capacity 21700 5000mAh battery (Premium LG Cell), yielding up to 7 hours of reliable runtime on Low mode. Built with smart mode memory and an over-discharge downshifting circuit to fully protect battery health.
150M DEEP DIVING WATERPROOF: Machined from heavy-duty aircraft-grade aluminum alloy paired with a thick 4mm AR-coated tempered glass lens. Rated for a true 150-meter (492 ft) water pressure resistance, serving as the ultimate primary or backup diving flashlight for deep technical diving.
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Most flashlights can directly get 5 years warranty; battery and accessories get 1 year warranty.
Any questions, please email to info@sperasflashlight.com
Choose the diving flashlight that fits your specific deep-sea diving style.
| Key Specifications | 🔥 BD42 (This Item) | BD40 Pro |
|---|---|---|
| Beam Angle Profile | 4° Super Focused Spot | 6.3° General Spot Beam |
| Max Brightness | 2500 Lumens | 3000+ Lumens |
| Switch Type | Stainless Steel Side Switch | Magnetic Rotary Switch |
| Primary Advantage | Cuts through murky water | Broader area illumination |
Powered by the Luminus SFT42R LED, the BD42 narrow beam dive torch pushes out 2500 lumens. The precision SMD reflector and AR-coated 4mm tempered lens provide a concentrated 4° narrow beam.
This intense focus translates to an incredible 618-meter throw, making it the perfect underwater search light for penetrating murky waters and signaling dive partners.
Select modes easily via the premium stainless steel side switch. The built-in power indicator displays accurate battery status (Green: 100%-30%, Red: 30%-5%).
To ensure safety, this diving flashlight features an Auto-Lock Function. If off for 3 minutes without operation, it locks automatically to prevent accidental battery drain.
Equipped with a high-capacity 21700 5000mAh Lithium battery, the BD42 offers highly reliable runtimes: 1.9 hours on High mode and up to 7 hours on Low.
The intelligent circuit of this technical diving flashlight includes Mode Memory, reverse polarity protection, and an over-discharge downshifting function.
Engineered for marine environments with aircraft-grade aluminum and double O-ring seals, the BD42 boasts a true 150-meter water pressure resistance rating.
It serves flawlessly as a heavy-duty primary or backup high-focused diving flashlight for deep technical dives and underwater cave exploration.
The BLUDIVE BD42 high-focused diving flashlight is engineered with an aerospace-grade AL6061-T6 aluminum housing and a robust 4mm AR-coated tempered glass lens for maximum pressure resistance.
Don't let murky waters ruin your technical dive. Upgrade your scuba gear with the Bludive BD42 and cut through the darkness with a laser-like 4° narrow beam and 2500 lumens.
🛒 SELECT OPTIONS & ADD TO CARTSecure Checkout | Official Warranty
In turbid or murky water, wide flood beams reflect light directly back toward your eyes (backscatter). The BLUDIVE BD42 utilizes a Luminus SFT42R LED to create a tight 4° narrow beam that punches straight through sediment, preventing blinding back-glare and making it a superior underwater search light.
Yes. It is constructed with thick aerospace-grade aluminum and robust double O-ring seals. Rated IP68 and tested to withstand water pressure up to 150 meters (492 ft), it performs flawlessly as a scuba dive light for advanced technical and cave diving.
| Model | BLUDIVE BD42 |
|---|---|
| Light Source | Luminus SFT42R |
| Max Output | 2500 lumens |
| Max Beam distance | 618 meters |
| Max Intensity | 95,760cd |
| Max running time | 7H for low mode |
| Modes | high-low-strobe |
| Switch | Stainless Steel Side Switch |
| Compatible Battery | 1 pce 21700 Li-ion Lithium |
| Water Resitance | IPX-8(150 meters underwater) |
| Impact Restance | 1.5 meters |
| Dimensions | 149.5(Length)*37(Head)*27(Tube)mm |
| Weight | 5.07oz/144g(battery excluded) |
| Body Material | Aerospace 6061 Aluminium |
| Application | Diving, Underwatert, Outdoor, Camping, Hiking, Everyday Carry |
| Note: The above data has been measured in accordance with international flashlight testing standards ANSI/NEMA FL1 using BLUDIVE 3.7V/ 5000mAh battery under laboratory conditions. | |
| BLUDIVE BD42.pdf | Download |




