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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
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The Bludive BD40 PRO is a high-tech advanced dive torch designed for the deep. Delivering a blinding 3000lm maximum output and a penetrating 464m beam distance. Featuring a humanized UI, auto-lock function, and a focused 6.3-degree spot angle, it brings highly effective illumination for hole hunting, recreational diving, or professional underwater search missions.


Utilizing a highly reliable Luminus SFT70 LED, the BD40 PRO slices through the murkiest waters. The perfect 6.3-degree tight beam angle (4.6-degree spot angle) concentrates the light, achieving a 464m max beam distance. It provides highly effective lighting for hole hunting and spearfishing in the poorest diving conditions.

Built like a tank. Crafted from aircraft-grade high-strength aluminum material, this diving flashlight boasts a remarkable water pressure resistance rating of 150 meters. Its compact size and less bulky body facilitate easy storage and handling, making underwater navigation much more flexible.

The stainless steel side switch makes selecting your desired mode (High, Med, Low) effortless. The built-in accurate battery indicator (Green/Red/Red Flash) lets you know your remaining power instantly. Plus, if turned off for 3 minutes, the Automatic Lock Function engages to prevent accidental activation in your dive bag.

Powered by a premium LG Cell 21700 5000mAh lithium battery, the BD40 PRO guarantees you won't be left in the dark. It offers a runtime of up to 2 hours on High mode and an impressive 4.4 hours on Low mode (400lm).
When exploring caves or hunting in murky waters, you need professional-grade reliability. Here is how the BD40 PRO compares to average dive lights.
| Features | BLUDIVE BD40 PRO | Standard Dive Lights |
|---|---|---|
| Max Brightness | 3000 Lumens | 800 - 1500 Lumens |
| Waterproof Rating | 150 Meters (Extreme Pressure) | 60 - 100 Meters |
| Beam Profile | 6.3° Tight Spot (464m Throw) | Wide Flood (Poor visibility in murky water) |
| Safety Lock | 3-Min Auto-Lock Function | Manual only or None |
| Battery Indicator | Real-time 3-stage LED indicator | No indicator (Guessing game) |
Everything a professional diver needs to hit the water immediately.
Don't compromise on underwater visibility. Whether you are hole hunting, spearfishing, or exploring wrecks, the 3000lm BD40 PRO is your ultimate underwater companion.
A tight spot angle (like the 6.3-degree beam on the BD40 PRO) is essential for penetrating murky water. Wide floodlights tend to reflect off particles in the water, creating glare (backscatter). A focused beam cuts through the water, making it highly effective for hole hunting, spearfishing, and spotting marine life hidden in crevices.
The BD40 PRO is professionally sealed and boasts a water pressure resistance rating of 150 meters (approx. 492 feet). This makes it more than capable for recreational scuba diving, technical diving, and deep wreck exploration.
You don't need to worry about drained batteries! The BD40 PRO features a smart Automatic Lock Function. If the flashlight is turned off for 3 minutes without operation, it will automatically lock itself. To unlock it, simply long-press the side switch for 2 seconds.
Yes. The stainless steel side switch features a built-in accurate battery indicator. It shines Green (100%-30%), Red (30%-5%), and Flashes Red (5%-1%). Furthermore, the over-discharge protection will automatically downshift the brightness when the battery is critically low, giving you ample time to safely end your dive.
| Model | BLUDIVE BD40 PRO |
|---|---|
| Light Source | Luminus SFT70 |
| Max Output | 3000 lumens |
| Max Beam distance | 464 meters |
| Max Intensity | 53,750cd |
| Max running time | 2H(at the turbo with 21700 5000mah battery) |
| Modes | turbo-high-medium-low |
| Switch | Stainless Steel Side Switch |
| Compatible Battery | 1 pce 21700 Lithium battery |
| Charging Type | change battery or battery USB-C charging |
| 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 (exclude battery) |
| 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. |
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| SPERAS BD40 PRO.pdf | Download |






