Cybernetica AS Department of Navigation Systems

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LED Buoy Light E821                                                

We regret to inform you that this product is DISCONTINUED; please find our current products here

The smart buoy light E821 is a local control system of a buoy consisting of one or two  LED-based  light sources,  a built-in solid state flasher, a GPS receiver, and a GSM communication controller. The light can be integrated into a remote control and monitoring system for use in marine buoys, pier lights, or on various moving vessels. The E821 lights are currently available in one of five colours: red, green, white, yellow, or blue.

The assembly consists of  a light unit with a shock proof acryllic lens for the focussing of the light beam, and of marine grade aluminium enclosure  with a flange for mounting of  the light, and cable plugs. The flanges are available in two versions making the lights usable in different buoys (see Specifications).  The GPS and GSM antennas are located on the top of the light. In order to protect the lights against mechanical shocks and harsh environmental conditions the lights should be installed under a polycarbonate cupola.


  • the solid state flasher of the systemis built using a programmable microcontroller performing the control of flashing of the light in accordance with the pre-configured light patterns, and  daylight switching ON and OFF of flashing by the  light sensor
  • communication with the remote control and monitoring system (centre) via public switched or GSM900 mobile telephone network. Exchange of  SMS messages with the centre
  • setting of the time schedule of communications and responding to  the inquiries
  • remote configuration by the commands of the centre
  • protection against  unauthorized  inquiries and commands
  • correction  of  the  built-in clock  based  on  the  GPS signals
  • checking the correspondence of the geographical coordinates of the light to the pre-configured  values and sending warning messages to the center in case of  unacceptable deviation
  • programmable scheduling of mobile phone standby mode in order to save energy

Photo of the Buoy Light E821


Typical wavelength
or radiation temperature
625 nm 
505 nm
5500° K  
590 nm  
470 nm
Light intensity of one light source cd,
vertical divergence ½ =5°
 Light intensity of one light source cd,
vertical divergence ½ =10°
Light intensity of one light source cd,
vertical divergence ½ =20°  
Voltage range 
from 9 up to 30 V DC using primary or accumulator batteries
Power consumption in flash 
4.5 W per one light source
Built-in flasher 
programmable by the customer
Flash length (programmable)  
any multiples of 10 ms up to 60.01 s
Period time (programmable) 
any multiples of 20 ms up to 655.35 s
Ambient air temperature
from -30°C up to +55°C, for the communication controller
from –20° up to +45° (IEC 60068-2-1, IEC 60068-2-2)
Relative humidity 
up to 95% at temperature +35°C (IEC 60068-2-3)
Mechanical vibration
10 - 100Hz  with acceleration up to 2,2g  (IEC 60068-2-6)
Repeated mechanical shocks
up to 10 g (IEC 60068-2-27)
Maximal rolling and inclination
± 45°
Ingress protection class
IP 67 (IEC 60529)
Operation in salt mist conditions
allowed (IEC 60068-2-52)


  Layout and dimensions of the Buoy Light E821

Layout and dimensions of the Buoy Light E821

Layout and dimensions of the flange 820.041  
Layout and mounting dimensions of the buoy light flange 820.041

Layout and dimensions of flange 820.042  
Layout and mounting dimensions of the buoy light flange 820.042

When requesting quotations, please specify your number of light sources and color requirements using the legend below:

Ordering legend

CAUTION: LED light units are sources of bright light, do not stare directly into the beam from close distances and observe all the warnings and guidelines in the Instruction Manual. ektaTM E821 LED Buoy Lights are classified as Class 2M LED devices with maximum optical power of 2mW (emitted wavelengths 400 to 700 nm) according to the standard IEC 60825-1:1993+A1:1997+A2:2001.

If you need more information, including the information on prices and availability of our products, please do not hesitate to contact our marketing group. We may be able to offer product customization and design services to accommodate your unique requirements.

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© 2002-2004 Cybernetica. Last updated 2011-03-01