What is the brightness of the light? I would appreciate knowing the lumens, not just a statement that it is bright.

The LEDs used in the strobe are 156 lm with a Luminous efficacy of. 151 lm/W. We will add that to the description.

What depth can it withstand while diving?

It's been taken down to 90 feet without issues.

Is this bright enough for daytime use?

there is no strobe which is bright enough for daylight use. in direct sunlight, you need to use colored smoke or a signal mirror (directed signal) type device. the sun emits white light and there are few devices which will emit something of similar intensity....

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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AQUA-SIRIUS LRS, Water Activated Long Range LED Strobe Light - USCG Approved Signaling Strobe - Does NOT Replace Flares and FAA TSO-C85b Approved, Exceeds SOLAS Requirements - Made in USA

AQUA-SIRIUS LRS, Water Activated Long Range LED Strobe Light - USCG Approved Signaling Strobe - Does NOT Replace Flares and FAA TSO-C85b Approved, Exceeds SOLAS Requirements - Made in USA

Product ID: 217663227

Details

Colour
White
Shape
Rectangular
Material
Plastic (ABS)
Finish type
Steel
Light source type
Led

⏳18+ hours bright strobe runtime

🌊Water-activated for instant use

💡3.5 miles visibility range

AQUA-SIRIUS LRS, Water Activated Long Range LED Strobe Light - USCG Approved Signaling Strobe - Does NOT Replace Flares and FAA TSO-C85b Approved, Exceeds SOLAS Requirements - Made in USA

Product ID: 217663227

Details

Colour
White
Shape
Rectangular
Material
Plastic (ABS)
Finish type
Steel
Light source type
Led

⏳18+ hours bright strobe runtime

🌊Water-activated for instant use

💡3.5 miles visibility range

Description

🚨 Stay visible, stay safe—because your survival gear should never leave you in the dark.

UNMATCHED VISIBILITY - Be seen from up to 3.5 miles away, ensuring you’re never out of sight in critical moments.
ENDURANCE THAT OUTLASTS - Flashes bright for over 18 hours and continues signaling for 5+ days on reduced brightness.
INSTANT WATER ACTIVATION - Automatically powers on when in contact with water—no fumbling, no delay.
RUGGED MARITIME TOUGHNESS - Built with high-impact ABS plastic and a crystal-clear lens to survive the harshest environments.
USCG FAA APPROVED SAFETY - Meets and exceeds SOLAS requirements, giving you trusted, certified reliability on every mission.

The AQUA-SIRIUS LRS is a USCG-approved, water-activated LED strobe light designed for long-range maritime signaling. With a visibility range of up to 3.5 miles and a runtime exceeding 18 hours on full brightness, it surpasses SOLAS safety standards. Constructed from durable ABS plastic and rigorously tested for reliability, this FAA TSO-C85b approved strobe is essential survival gear made in the USA.

Specifications

Color	White
Style	Safety
Shape	Rectangular
Light source	Led
Material type	Plastic, Acrylonitrile Butadiene Styrene (ABS)
Batteries included?	No
Brand	Lifesaving Systems Corp
Manufacturer	Lifesaving Systems Corp
Item model number	641-LRS
Package Dimensions	16.51 x 8.13 x 1.52 cm; 45 g
ASIN	B077Y45G5H

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