Moderated Discussion Areas
  ContinuousWave: Small Boat Electrical
  Red and White Courtesy Lamps

Post New Topic  Post Reply
search | FAQ | profile | register | author help

Author Topic:   Red and White Courtesy Lamps
dino54904 posted 10-30-2007 08:32 AM ET (US)   Profile for dino54904   Send Email to dino54904  
I am going to install a series of 12 volt courtesy lamps under the gunwales of my Outrage 19. I want both red and white light options. I am going to install a dual position switch so I could select which color I want. Who makes a unitized courtesy light that has both red and white bulbs in them so I do not have to buy and install two lights in each location?
Bella con23 posted 10-30-2007 01:56 PM ET (US)     Profile for Bella con23  Send Email to Bella con23     
dino - I'm thinking along the lines of a dual-wired LED replacement bulb that has a common and two conductors, one for red and one for white light.
This would be the same as a battery charger LED that changes from red to green only in an automotive bulb configuration.

I would give these guys a call and see if they know of any product that would do the job.

I like the idea by the way. As much as I like my courtesy lights, they are to bright to use while underway.

Chuck Tribolet posted 10-30-2007 05:16 PM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
The bicolor LEDs have only two conductors. Reverse the polarity
to change the color.


Bella con23 posted 10-30-2007 07:45 PM ET (US)     Profile for Bella con23  Send Email to Bella con23     
Ahh! That's how they work. I thought the LED's were polarity sensitive and would only operate in on direction of the circuit.
Bella con23 posted 10-30-2007 09:26 PM ET (US)     Profile for Bella con23  Send Email to Bella con23     
Very interesting (but large) definition in Wikipedia. It seem that we are both correct in current LED configurations. It would make perfect sense that if we applied power to a two wire bicolor LED that the "A" color would operate and if you reverse the polarity "B" color would operate.

"Bicolor LED units contain two diodes, one in each direction (that is, two diodes in inverse parallel) and each a different color (typically red and green), allowing two-color operation or a range of apparent colors to be created by altering the percentage of time the voltage is in each polarity. Other LED units contain two or more diodes (of different colors) arranged in either a common anode or common cathode configuration. These can be driven to different colors without reversing the polarity, however, more than two electrodes (leads) are required."

Now to find that "bulb" for dino!

davej14 posted 10-31-2007 06:22 PM ET (US)     Profile for davej14  Send Email to davej14     
You are not likely to find a bi-color LED with one being white. The reason is that the white color is produced by secondary emissions and not the LED chip itself. Typically the LED chip in a "white" LED is emitting UV that creates a secondary white emission from phosphorous in the lens.

In a colored LED the emissions from the LED chip are the color you see.

Post New Topic  Post Reply
Hop to:

Contact Us | RETURN to ContinuousWave Top Page

Powered by: Ultimate Bulletin Board, Freeware Version 2000
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.