The Hull Truth - Boating and Fishing Forum

Go Back   The Hull Truth - Boating and Fishing Forum > BOATING FORUMS > The Boating Forum
Search

Notices

Random Quote: Fish on!
Reply
 
Thread Tools Search this Thread
Old 07-28-2012, 08:42 PM
  #1    
OTF
Senior Member
 
Join Date: Jun 2011
Location: Fullerton
Posts: 742
Default LED Lighting: One Side is Dimmer Than The Other

Installed LED strip lighting on my Conch27 on Friday:


Couldn't help but notice that the port side is dimmer than starboard.

Port:


Starboard:


They're installed in the same position under the gunwale. The rear portion of the port side has wash down plumbing under the gunwale and between the lights and the hull sde. I thought that might be cutting down the light refraction, but the forward portion has no obstructions and is still dimmer. They are all on the same circuit though the two segments under the port side are soldered to the originally connected segments and thus are once/twice removed from the power source. The original light segments on the starboard side both connect to the power leads in the column for the fuel fill midship and eminate forward and aft from there, so they are directly connected to the power source.

Am I losing juice to the subsequent port segments through the soldered connections? When I look directly at the port side lights, they look as bright as the starboard side. They're just not lighting the deck as bright.
__________________
OTF is offline   Reply With Quote
Old 07-28-2012, 09:15 PM
  #2    
Senior Member
 
Join Date: Feb 2011
Location: NJ
Posts: 715
Default

i think It probably is the fact that they are on the same circuit, one is stealing power before it gets to the other one, which is odd since they are leds.
__________________

07' 290 Coastal twin 250 Yamahas
tom10122 is offline   Reply With Quote
 
Old 07-28-2012, 09:18 PM
  #3    
Admirals Club
 
Join Date: Oct 2009
Location: Ft Lauderdale Fl
Posts: 5,580
Default

Do you have these run in series or parallel?
bumster is offline   Reply With Quote
Old 07-28-2012, 10:29 PM
  #4    
Senior Member
 
Join Date: Aug 2010
Posts: 564
Default

Sounds like you have all segments in series, correct? If so, the voltage drop is too significant at the third and fourth segment. You will want to wire the two dim segments in parallel with your bright side.
the_gooch is offline   Reply With Quote
Old 07-28-2012, 11:08 PM
  #5    
OTF
Senior Member
 
Join Date: Jun 2011
Location: Fullerton
Posts: 742
Default

Yes, the port or dim side segment are wired in series; the starboard side segments are both in parallel or connected directly to the power source. Nowhere have I read here have they advised otherwise, so this is news to me.

It would be a major under taking to run a separate power lead to the other side of the boat to achieve wiring in parallel. I was able to use a conduit I had previously installed through the starboard stinger for leads going to the windlass. There is nothing going through the port side stringer. Running a lead from the starboard side up under the gunwale around the boat would be pretty extensive too. I thought they bragged how these LEDs consumed so little power?
__________________
OTF is offline   Reply With Quote
Old 07-29-2012, 08:47 AM
  #6    
Admirals Club
 
Join Date: Oct 2009
Location: Ft Lauderdale Fl
Posts: 5,580
Default

Depending on the product you have will dictate if you can run them in series. If they are only 24w rolls then you should be able to with no problem. If they are 72w rolls then running them in series causes the problem you are having.
bumster is offline   Reply With Quote
Old 07-29-2012, 12:35 PM
  #7    
OTF
Senior Member
 
Join Date: Jun 2011
Location: Fullerton
Posts: 742
Default

Quote:
Originally Posted by tom10122 View Post
i think It probably is the fact that they are on the same circuit, one is stealing power before it gets to the other one, which is odd since they are leds.
Yeah, I went to the MB Electronics tutorial here on how to solder connect LED strips, BUT NOWHERE IS THERE AN ADVISORY TO NOT CONNECT LED STRIPS IN SERIES TO AVOID DIMNESS FROM POWER LOSS. The mere existence of that tutorial on how to connect LED strips would imply that wiring in series is perfectly acceptable. Obviously it's not.

I am in the middle of the project to rewire the lights in parallel. Not as bad as expected. I was able to route the wire along existing bundles and then found a bilge pump hose that exits the engine bilge over the top of the starboard stringer which has a lower section built to accommodate a couple hoses going through there and pulled the wiring through there. A couple added benefits arose: 1) I was able to eliminate the PVC wash down pipe running under the gunwale to the stanchion and re-routed the hose connected to it from its run completely around the transom and up the gunwale to where it now simply follows the bilge hose up through the stanchion. I will add a marelon fitting to go through the stanchion with a threaded hose connection and cap on the outside. 2) I got rid of the other plastic fuel fill and cap and replaced it with a stainless steel one to match the starboard side. Plastic is tacky cheap and breaks. I'm putting it back together now, just need the marelon hose fitting, some soldering and putting back the stanchion.
__________________
OTF is offline   Reply With Quote
Old 07-29-2012, 12:43 PM
  #8    
Admirals Club
 
Join Date: Oct 2009
Location: Ft Lauderdale Fl
Posts: 5,580
Default

Its not just a power loss. Voltage drop and heat go hand in hand.
This is the very reason that Data/Spec sheets should be at the very least looked at.
bumster is offline   Reply With Quote
Old 07-29-2012, 01:18 PM
  #9    
OTF
Senior Member
 
Join Date: Jun 2011
Location: Fullerton
Posts: 742
Default

Quote:
Originally Posted by bumster View Post
Its not just a power loss. Voltage drop and heat go hand in hand.
This is the very reason that Data/Spec sheets should be at the very least looked at.
None were provided. Bought from a vendor here on THT.
__________________
OTF is offline   Reply With Quote
Old 07-29-2012, 01:26 PM
  #10    
Admirals Club
 
Join Date: Oct 2009
Location: Ft Lauderdale Fl
Posts: 5,580
Default

Do you know what product you bought? How many watts per roll? Amps draw?
bumster is offline   Reply With Quote
Old 07-29-2012, 02:37 PM
  #11    
OTF
Senior Member
 
Join Date: Jun 2011
Location: Fullerton
Posts: 742
Default

Quote:
Originally Posted by bumster View Post
Do you know what product you bought? How many watts per roll? Amps draw?
Blue LED strips from MB Electronics. Do not know watts or Amps per roll.

Just finished soldering in the other side using 16/2 wiring. It lights, but I'll have to wait until dark to see if there's a difference.
__________________
OTF is offline   Reply With Quote
Old 07-29-2012, 08:47 PM
  #12    
OTF
Senior Member
 
Join Date: Jun 2011
Location: Fullerton
Posts: 742
Default

Alright, much improved after wiring them in parallel.

Port:


Starboard:


Before:


After:


Before:


After:
__________________

Last edited by OTF; 07-30-2012 at 08:46 AM.
OTF is offline   Reply With Quote
Old 07-29-2012, 09:09 PM
  #13    
Senior Member
 
Join Date: Feb 2011
Location: NJ
Posts: 715
Default

Quote:
Originally Posted by bumster View Post
Its not just a power loss. Voltage drop and heat go hand in hand.
This is the very reason that Data/Spec sheets should be at the very least looked at.
I didn't think LEDS put out much if any heat?
__________________

07' 290 Coastal twin 250 Yamahas
tom10122 is offline   Reply With Quote
Old 07-30-2012, 04:57 AM
  #14    
Senior Member
 
Join Date: Jan 2006
Location: Sunny florida
Posts: 10,837
Default

ALWAYS! listen to Bumster/Rob. He's the go-to guy on here for LED lighting.
billinstuart is offline   Reply With Quote
Old 07-30-2012, 05:55 AM
  #15    
Senior Member
 
Join Date: Mar 2011
Location: Fallston, MD
Posts: 285
Default

Quote:
Originally Posted by tom10122 View Post
I didn't think LEDS put out much if any heat?
They actually put out a large amount of heat per light but being in the open, it disspates very quicly and won't really be noticed. Heat dissipation is directly related to LED longevity IIRC.

LED light bars have large heat sinks on them
Kack is offline   Reply With Quote
Old 07-30-2012, 07:08 AM
  #16    
Admirals Club
 
Join Date: Oct 2009
Location: Ft Lauderdale Fl
Posts: 5,580
Default

Quote:
Originally Posted by tom10122 View Post
I didn't think LEDS put out much if any heat?
In the situation above its not heat from the LED its the heat build up at the original connection point. These are laid on a very thin foil tape and when you run to much current thru it you stand a very good chance of damaging the circuit, On a 24w roll it doesn't usually make a difference but when you get up to a 74w roll it starts to make a big difference
bumster is offline   Reply With Quote
Old 07-30-2012, 08:44 AM
  #17    
OTF
Senior Member
 
Join Date: Jun 2011
Location: Fullerton
Posts: 742
Default

Quote:
Originally Posted by bumster View Post
In the situation above its not heat from the LED its the heat build up at the original connection point. These are laid on a very thin foil tape and when you run to much current thru it you stand a very good chance of damaging the circuit, On a 24w roll it doesn't usually make a difference but when you get up to a 74w roll it starts to make a big difference
Thanks for the input. This is the first I've read anything here about the wiring constraints with the LED lighting. I guess I lucked out when I did my Blackman 20 because there was no way to run wire from the console under the deck to the hull sides. My wiring went through the wiring bundle to the engine compartment, up the transom where I split it between the two LED strips I installed. So in that instance my boat configuration forced a parallel wiring set-up.
__________________
OTF is offline   Reply With Quote
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

 



©2009 TheHullTruth.com

Powered by vBulletin® Version 3.7.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.2.0