Bigblue STRB-3K Dive Safety Strobe, 3600 Lumens, 270° Beam

Name: Bigblue STRB-3K 3600-Lumen Strobe
Brand: Bigblue Dive Lights
SKU: STRB-3K
Price: 299.00 USD
Availability: InStock

Bigblue STRB-3K 3600-Lumen Strobe, view 2

Bigblue STRB-3K 3600-Lumen Strobe, view 3

Verified by our in-house dive instructors

60-Day Money Back Return Policy 60-Day Money
Back Return
Policy

Limited Warranty 2 year coverage Limited
Warranty 2
Year Coverage

Description

The STRB-3K puts out 3600 lumens, the most of any Bigblue strobe. Bigblue calls it mega bright for safety applications. Three LEDs push a 3600-lumen strobe signal through a wide 270° beam, flooding the water around you so your position and your signals are clear.

It flashes 120 times a minute while power is above 20%, then 60 times a minute below 20%. Burn time is 8 hours.

A glove-friendly, body-mounted push button with a battery indicator runs it, made for quick activation when it matters most. The body is anodized aluminum alloy, tested to 150 meters, and it weighs 179 g with the battery.

It runs on a rechargeable 18650 Li-ion battery, charged with the included USB charger. Bigblue suggests 3–4 hours to charge. A lanyard and a 3L outdoor dry bag come in the box.

To mount it, Bigblue lists its NP Ball Joint Connector, a clip with a 1-inch ball joint. Bigblue’s Surface Marker Buoy has a pouch at the top that holds an STRB series strobe. Both are sold separately.

Want colors or infrared? The STRB-RGB flashes white, red, blue or green, and the STRB-IR flashes 940nm infrared for night-vision gear.

STRB-3K strobe
18650 battery
USB charger
Lanyard
3L outdoor dry bag

Get support from passionate diving experts dedicated to going the extra mile for you.

Troubleshooting a product issue
Finding the right setup for your dive
Installing components

(805) 967-4456 info@sbaquatics.com

Product Features

3600-lumen flash
Bigblue calls it mega bright for safety applications. The flash floods the water around you so you’re easy to spot.
Wide 270° beam
The flash spreads across 270°, so it reads from most angles, not just straight ahead.
Smart flash rate
It flashes 120 times a minute, dropping to 60 a minute when power falls below 20%. Burn time is 8 hours.
Glove-friendly push button
One body-mounted push button with a battery indicator, made for quick activation when it matters most.
Fits the SMB pouch
Bigblue’s Surface Marker Buoy has a pouch at the top made for an STRB series strobe.

Which STRB strobe is right for you?

All three share the same 40 x 139.5 mm aluminum body, a 270° beam, 8 hrs burn time, a rechargeable 18650 battery and a 150 m test depth.

STRB-3K

3600 lumens, the most of any Bigblue strobe, for safety and signaling.

3600 lm white flash
3 LEDs, 6500K
Bigblue: mega bright for safety

STRB-RGB

Four flash colors for different signals.

1500 lm white, 360 lm red
120 lm blue, 900 lm green
Bigblue: multi-color, multi-use

STRB-IR

A covert 940nm infrared flash.

Invisible to the naked eye
Visible through NVG systems
Bigblue: tactical applications

Is it right for you?

Who it’s for

Tech divers
Safety-minded divers
Dive teams

Best for

Marking your position
Underwater communication
SMB signaling
Backup safety light

Power modes

Mode	Output	Burn time
White strobe	3600 lm	8 hrs

Flash rate is 120 pulses per minute with power above 20%, and 60 per minute below 20%.

Add-ons

Specifications

Output

Max output: 3600 lm
Modes: White strobe
Light source: 3 x LED
Flash rate: 120 per min (power above 20%), 60 per min (below 20%)
Color temperature: 6500K

Beam

Beam angle: 270°

Power

Burn time: 8 hrs
Battery: 18650 Li-ion rechargeable
Charger: USB charger included
Charge time: 3–4 hrs (Bigblue suggested)
Switch: Body-mounted push button with battery indicator

Build

Casing: Anodized aluminum alloy
Max depth: 150 m tested (492 ft)
Size: Dia. 40 x L 139.5 mm (1.6 x 5.5 in)
Weight in air: 179 g (6.3 oz) with battery
Buoyancy in seawater: -88 g (-3.1 oz) with battery
Light head: Interchangeable, Bigblue Type I
Bigblue category: Tech backup

Product Details

Shipping & Returns

Free standard shipping on orders over $50
Free 2-day shipping on orders over $300
Standard Ground delivery in 3–5 business days
Most orders process within 1 business day
Free returns within 60 days — buyer covers return shipping unless it's our error
Free return shipping on exchanges

Start a Return →

Questions? Email info@sbaquatics.com or see our full Shipping & Returns Policy.

Frequently Asked Questions?

What color is the flash?

White, 6500K. For colored flashes, Bigblue’s STRB-RGB flashes white, red, blue and green.

How long will it flash on one charge?

Bigblue rates it at 8 hours. The flash rate drops from 120 to 60 pulses per minute when power falls below 20%.

How do I mount it?

Bigblue lists its NP Ball Joint Connector, a mounting clip with a 1-inch ball joint, for the STRB strobes. It’s sold separately.

Can I put it on my SMB?

Yes. Bigblue’s Surface Marker Buoy has a pouch at the top that holds an STRB series strobe, for maximum visibility and safety.

How long does it take to charge?

Bigblue suggests 3–4 hours for the 18650 battery with the included USB charger.

Reviews

Need help choosing?

Our dive experts are here to help. Contact us anytime with fit, setup and compatibility questions.

Contact Us

Shop By Activity

Shop By Activity

Shop By Category

Shop By Category