subsea light is a blindingly bright LED light for use on ROVs, AUVs, and other subsea applications. We designed this 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
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.
It’s housed in a rugged hard-anodized aluminum enclosure with an acrylic end-cap and two cable penetrators at the rear, allowing it to go to depths of 300m. By default, the second cable penetrator is blank, but the light comes with a second penetrator to allow a second light to be connected to the first (daisy-chaining). That means you only need one cable coming from the main watertight enclosure to control multiple lights!
The specially designed injection molded acrylic lens ensures a consistent beam angle in both air and water. Here’s a good explanation
of why the dome lens shape is important underwater! An extruded aluminum mounting bracket allows the light to be mounted anywhere. It holds the light with an O-ring (like many bike lights) and has both threaded and through-hole mounting holes.
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.
The electrical schematic, board layout, and Arduino-based firmware are open-source and the design files are available below. Feel free to adapt for your own needs.
We recommend that you don’t look directly into this light
to avoid any damage to your eyes!
- 1 x Lumen Subsea Light
- 1 x Lumen Mounting Bracket
- 1 x O-ring for Mounting Bracket
- 1 x Lumen Cable Penetrator for 4mm Cable
- 1 x O-ring for Cable Penetrator