Lumen Subsea Light (Pre-Connected Sets)
Lumen Subsea Light (Pre-Connected Sets) - Marine Thinking
Lumen Subsea Light (Pre-Connected Sets) - Marine Thinking
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Lumen Subsea Light (Pre-Connected Sets)

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These are pre-connected (daisy-chained) sets of Lumen Subsea Lights, making it easy to install two or four lights with a single penetrator to the watertight enclosure. All lights will respond to a single signal. See here for the individual Lumen Lights.

Product Description
The Lumen Subsea Light is a blindingly bright LED light for use on ROVs, AUVs, and other subsea applications. We designed this underwater light specifically for this purpose and it has a few neat features:

  • Fully dimmable control using a PWM servo signal (1100-1900 μs)
  • Simple on/off control with no signal needed
  • Daisy-chainable to connect multiple lights from a single connection
  • Automatic, smart over-temperature compensation for maximum light output and safety in air
  • New in R2: Built-in mounting holes on the side of the case (M3 thread)
  • New in R2: Exponential brightness control with much lower minimum brightness output
  • New in R2: 500m depth rating

Using a high-efficiency Cree XLamp MK-R LED, the light outputs over 1500 lumens at 15 Watts – brighter than most car headlights! It has a 135 degree beam angle for wide illumination in front of an ROV. The color temperature is 6200K, similar to most dive lights and ROV lights.

In addition to really high brightness, the Lumen R2 is designed for very low brightness output, which is important to be able to illuminate the scene without washing out the colors or brightness. An exponential brightness curve makes it intuitive to use effectively.

It’s housed in a rugged hard-anodized aluminum enclosure with two cable penetrators at the rear, allowing it to go to a depth of 500m. The specially designed injection molded acrylic lens ensures a consistent beam angle in both air and water. The case has a built-in mounting bracket with two M3 threaded holes for mounting to your vehicle.

For those who want to use the light in other applications, like scuba diving, the light can be operated without a PWM signal. Just connect the yellow signal wire to the power wire and it will turn on! A switch can be used here to make this even more convenient.

The light operates on 10-48V inputs and can accept PWM signals from 3-48V! It is compatible with many common boards like the Arduino, Raspberry Pi, and PixHawk. The case warms up to a comfortable 55°C (131°F) when operated in air and stays much cooler in water.

Note: We recommend that you don’t look directly into this light to avoid any damage to your eyes!



Parameter Value
Supply Voltage (V in ) 7 - 48 volts
Full Brightness Supply Voltage (V in ) 10 - 48 volts
PWM Logic Voltage 3 - 48 volts
Peak Current 15 / V in  amps
Maximum Brightness 1,500 lumens
Color Temperature 6,200 kelvin
Beam Angle 135 degrees in water
Cable Diameter 4.3 mm 0.17 in
Cable Length (between lights) 1 m 39 in
Cable Length (between red penetrator and first light) 0.75 m 30 in
Cable Jacket Black Urethane
Conductor Insulation Polypropylene
Conductor Gauge 22 AWG
Wires Black - Ground
Red - Power
Yellow - Signal
Pressure Rating 500 m 1640 ft
Overall Length 68.9 mm 2.71 in
Overall Diameter 37 mm 1.46 in
Bracket Mounting Hole Spacing 19 mm 0.75 in
Bracket Screw Size M3
Weight in Air (w/ 1m cable) 102 g 3.60 oz
Weight in Water (w/ 1m cable) 53 g 1.87 oz
Maximum Temperature when Run in Air 55° C 130° F




  • 1 x Lumen Subsea Light Set, pre-connected with 2 or 4 lights
  • 4-8 x Stainless steel M3 mounting screws
  • 1 x Nut for Pre-installed Cable Penetrator
  • 1 x O-ring for Pre-installed Cable Penetrator