Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 05-11-2016, 01:34   #1
Registered User

Join Date: Aug 2013
Posts: 105
Question LED light problem

I have a two bulb light fixture in my galley. Both " bulbs" are nine element LED clusters. Each bulb is controlled by it's own switch. Positive and negative wires are common until the positive wires split off to the separate switches. About a month ago, one of the bulbs dimmed and started flickering. It turned out that only three of the nine elements were flickering, the other six weren't working at all. I replaced the "bulb" but there was no change. Still 3 flickering elements and 6 dead ones. I replaced the switch. No change. I replaced the socket,No change. I renewed the wires from the common positive and negative wires. No change. The other "bulb" that feeds off of the common wires works fine. As my wife says, we can live without the extra light, but this is very puzzling. What could the problem be?
__________________

ingrid75 is offline   Reply With Quote
Old 05-11-2016, 03:35   #2
Registered User

Join Date: May 2010
Posts: 667
Re: LED light problem

LEDs are very voltage sensitive. A 12 v LED will behave erratically if the voltage drops to 11.99v. Even the slightest voltage variation will cause them to flicker. If your fridge is running, the lights will misbehave. and voltage drop will cause them to act up. Even the variation from a 12v sound system will affect them. Check your supply voltage under load. Swap the LEDs and see what happens. Heavier wires might help but somehow, you need to provide a stable 12+ volts. You might need to have a separate battery that drives only the lights. If you are only charging from an alternator, that might not charge the batteries to a high enough level of charge.
__________________

dlymn is offline   Reply With Quote
Old 05-11-2016, 04:47   #3
Registered User

Join Date: Jan 2012
Location: Full time cruisers
Boat: Krogen 42
Posts: 396
Re: LED light problem

have you placed any other electronic devices near by?
__________________
----------------------------------
Terry
meridian28 is offline   Reply With Quote
Old 05-11-2016, 07:21   #4
Registered User
 
Stu Jackson's Avatar

Join Date: Jan 2011
Location: Cowichan Bay, BC (Maple Bay Marina)
Posts: 8,146
Re: LED light problem

Who made the fixture? And the lamps. Sometimes folks will know about manufacturers' defects and chime in. Why not share that info?
__________________
Stu Jackson
Catalina 34 #224 (1986) C34IA Secretary
Cowichan Bay, BC, (Maple Bay Marina) SR/FK, M25, Rocna 10 (22#) (NZ model)
Stu Jackson is online now   Reply With Quote
Old 05-11-2016, 17:14   #5
Registered User

Join Date: Oct 2016
Location: Pensacola Florida
Boat: 1984 Moody 27
Posts: 184
Re: LED light problem

Quote:
Originally Posted by ingrid75 View Post
I have a two bulb light fixture in my galley. Both " bulbs" are nine element LED clusters. Each bulb is controlled by it's own switch. Positive and negative wires are common until the positive wires split off to the separate switches. About a month ago, one of the bulbs dimmed and started flickering. It turned out that only three of the nine elements were flickering, the other six weren't working at all. I replaced the "bulb" but there was no change. Still 3 flickering elements and 6 dead ones. I replaced the switch. No change. I replaced the socket,No change. I renewed the wires from the common positive and negative wires. No change. The other "bulb" that feeds off of the common wires works fine. As my wife says, we can live without the extra light, but this is very puzzling. What could the problem be?
#1 cause would be a low voltage. It could also be a poor ground not allowing current to flow through the diode. If you're measuring good voltage at the fixture and it isn't low with your multimeter, consider checking your ground connections and cleaning all terminals. A small voltage regulator board with a capacitor bank will help stabilize the power flickering at LED fixtures, but is really overkill for most applications. The current consumption for an LED array is pretty small. Voltage regulator chip packages and support components could be easily mounted behind the fixture and take up only a couple inches of space.

If you feel that it's not a voltage issue or a connector issue you might want to try a different brand of LED array. There are huge differences in quality control from manufacturer to manufacturer. I've had those screw in arrays that were very poorly soldered. They were also oriented in a triangle instead of forward facing. The boards were terribly constructed and had a lot of bridged connections and defects that kept otherwise good diodes from lighting. It was tedious to fix, but after some time with the soldering iron I got them working right.

Since yours was working and now is not, likely it is a voltage or poor connection issue rather than quality of construction.

Remember a diode only works when the energy is flowing in the right direction. If you wire them backwards they will try to block the flow of energy until you reach the PIV (Peak Inverse Voltage) and they make a nice pop when the smoke comes out.
Seeking Solace is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
LED masthead light problem bluemoose Electrical: Batteries, Generators & Solar 1 07-07-2013 19:38
LED Anchor Light Update 29cascadefixer Electrical: Batteries, Generators & Solar 121 04-07-2012 15:58
LED light turned Nav light BLUE!!! MarkJ Electrical: Batteries, Generators & Solar 19 28-01-2009 10:19

Advertise Here


All times are GMT -7. The time now is 11:14.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.