Blue Robotics Lumen Light R2 User manual

7/31/2018 Lumen Light R2
http://docs.bluerobotics.com/lumen-r2/ 1/6

Lumen Light R2
Introduction
 This page is the most recent Lumen documentation page. If you have an older Lumen Light, you may wish to refer to the
archived documentation page: Lumen Light R1 (Retired July 2018) (http://docs.bluerobotics.com/lumen/).
The Lumen Light is a sealed LED light which can supply up to 1500 lumens at depths of up to 950 meters. The Lumen Light can be
smoothly dimmed with a servo PWM signal or simply turned on/o with a switch. Up to six lights can be daisy-chained together
and controlled with a single signal, requiring only one penetration into a watertight enclosure.
Quick Start (on/o with no PWM signal source)
1. Connect the power wires to a power source
Red: +10-48 volts
Black: Ground
2. Connect the yellow signal wire to the the power wire directly or through a switch to turn on to full brightness
Quick Start (dimming with PWM signal)
1. Connect the signal wire to the appropriate microcontroller pin
Yellow: PWM (3-48 volts)
2. Connect the power wires to a power source
Red: +10-48 volts
Black: Ground
3. Provide a servo PWM pulse from 1100 μs (o) to 1900 μs (brightest)
Specications
Specication Table
For further information please see the Cree XLamp MK-R LED Data Sheet
(http://www.cree.com/~/media/Files/Cree/LED%20Components%20and%20Modules/XLamp/Data%20and%20Binning/XLampMKR.pdf).
The specic LED model used is MKRAWT-00-0000-0B00H4051.
Electrical  
Item Value 
Supply Voltage (V ) 7 - 48 volts 
in

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Electrical  
Full Brightness Supply Voltage (V ) 10 - 48 volts 
PWM Logic Voltage 3 - 48 volts 
Peak Current 15 / V amps 
Light  
Maximum Brightness 1,500 lumens 
Color Temperature 6,200 kelvin 
Cable  
Cable Diameter 4.3 mm 0.17 in
Cable Length 1 m 39 in
Cable Jacket Black Urethane 
Conductor Insulation Polypropylene 
Conductor Gauge 22 AWG 
Wires Black - Ground 
 Red - Power 
 Yellow - Signal 
Physical  
Pressure Rating 950 m 3120 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
Beam Angle 135 degrees in water 
[1] Pressure rating is based on testing and a conservative safety factor.
2D Drawings
Lumen Light Assembly
3D Model
All 3D models are provided in zip archives containing the follow le types:
in
in
1

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SolidWorks Part (.sldprt)
IGES (.igs)
STEP (.step)
STL (.stl)
Lumen Light 
Lumen Light R2 Assembly LUMEN-ASM-LIGHT-R2.zip (/lumen-r2/cad/LUMEN-ASM-LIGHT-R2.zip)
Installation
The Lumen Light can be easily installed using the included threaded M3 mounting holes.
Using the Threaded Holes
The two threaded holes are best used when you have access to install a screw that tightens into the holes. This applies to most
ROVs. Note that the threaded holes have the same size and spacing as the thruster mounting holes so you can use a thruster
mounting bracket or hole pattern.
1. Drill two holes between 3.1mm and 3.3mm (0.12-0.13”) in diameter 19mm (0.75”) apart on the part you wish to mount the
light.
2. Install two M3x0.5 screws through the holes that you just drilled. We recommend 316 stainless steel screws and they should
be roughly 1.5 - 3.0mm longer than the thickness of the part that you are mounting to. Optional: Apply a small dab of
Medium-strength (blue) threadlocker such as Loctite 243 to the M3 screws.

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3. Attach the Lumen onto the screws and tighten until hand tight. Be careful to avoid over-tightening and stripping the
threads.
Daisy Chain Connection
The Lumen Light can be daisy chained (https://en.wikipedia.org/wiki/Daisy_chain_%28electrical_engineering%29) using the
following procedure:
 Use caution if you disassemble and reassemble your Lumen Light. The black screws are made of aluminum and will break
if over-torqued. We recommend using a torque wrench and applying no more than 20lbs of force when reassembling.
[Due to dierences in internal wire connections, New Instructions COMING SOON]

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Example Code
Arduino
This example uses the Arduino Servo library to control the light brightness. This provides an update rate of 50 Hz and can use
any pin on the Arduino board as the “servoPin”.
If you’ve never used Arduino before, we suggest checking out some tutorials! (https://www.arduino.cc/en/Tutorial/HomePage)
#include <Servo.h>
byte servoPin = 9;
Servo servo;
void setup() {
servo.attach(servoPin);
servo.writeMicroseconds(1100); // send "off" signal to Lumen light
}
void loop() {
int signal = 1700; // Set signal value, which should be between 1100 and 1900
servo.writeMicroseconds(signal); // Send signal to Lumen light
}

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