LED Bulb Experience - Page 2 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > Boat Builders Row > Pacific Seacraft
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #11  
Old 01-14-2009
N0NJY's Avatar
Senior Member
 
Join Date: Oct 2008
Location: Colorado
Posts: 795
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 7
N0NJY is on a distinguished road
Quote:
Originally Posted by noelex77 View Post
LEDs produce heat and unfortunately the heat is produced at the back of the diode rather than projected out like incandescent s. Heat build up is one of the common causes of LED failure. Many LED light sources require heatsinking to work when the equivalent light output from a conventional globe would not require a heatsink.
The LED globes used as replacements in masthead lights take the heat generation of the LEDs into account and are safe for the masthead fitting, but if designing an LED light fitting from scratch heat dissipation is one of the problems the manufacturer has to overcome for long life and high output.
LEDs do produce heat. However, NOT as much as incandescent lamps do.

Note that almost EVERY visible radiation light emitting diode made does NOT have a heat sink either (except laser diodes). A very few bright LEDs have some sort of heat sink.

As Noelex states if the design is properly accomplished the heat is taken into account and the LEDs will last for hundreds of thousands of hours, probably longer than most of you will own a boat. On the other hand, LEDs DO fail on occasion.
__________________
Rick Donaldson, NØNJY

moˈloːn laˈbe!

It's better to be hated for who you are, than to be loved for who you're not.

Let those winds of change blow over my head,
I'd rather die while I'm living than live while I'm dead - Jimmy Buffet
Reply With Quote Quick reply to this message Share with Facebook
  #12  
Old 01-14-2009
Senior Member
 
Join Date: Jan 2008
Posts: 409
Thanks: 1
Thanked 6 Times in 6 Posts
Rep Power: 7
noelex77 is on a distinguished road
Leds produce less heat per lumen than incandescent lamps, but the heat build up in the light fitting tends to be higher. This is why even cheap LED torches are often aluminium. The aluminium casing acts as a heatsink for the emmiters.
LED diodes do not have a heatsink in the raw component stage even emmiters that would only last a few seconds without any heatsink.
When mounted however they require careful consideration of how the excess heat is removed. Sometimes this is accomplished by driving the LED at low current levels, but more efficient heatsinking allows for much higher light outputs. This is why so many LED torches and purpose designed masthead lights like Lopolights are aluminium.
Reply With Quote Quick reply to this message Share with Facebook
  #13  
Old 01-31-2009
Member
 
Join Date: Feb 2002
Posts: 62
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
samchristo is on a distinguished road
LED's

We've replaced our anchor, tricolor, spreader and running lights a couple of years ago with Dr LED bulbs and have been very pleased.

Inside we've gone to Sensibulb and Dr LED but a friend showed us a light that was a lot brighter than ours. I'll need to email him for the brand (Marine Bright?).

We also use a couple of Bebi lights to light up the boat at anchor for safety reasons.

We spend a lot of time on the hook and consider the LED's to be crucial for battery management.

Sam
s/v Grace PSC34#163
Reply With Quote Quick reply to this message Share with Facebook
  #14  
Old 02-02-2009
Mondofromredondo
 
Join Date: Nov 2008
Location: Redondo Beach, California
Posts: 154
Thanks: 5
Thanked 4 Times in 4 Posts
Rep Power: 7
mondofromredondo is on a distinguished road
Anyone know the style of bulb in the tricolor light fixture?
I'd sure like to have the bulb in hand when I go up there to replace it.
Am very interested in using these Dr. LED's which look to be well thought out.
My tricolor is the model used on the 1988 PSC 34.
Thanks all!

Keith
PSC 34
S/V CHARITY ROSE
Reply With Quote Quick reply to this message Share with Facebook
  #15  
Old 05-25-2009
Mortimer49735's Avatar
Junior Member
 
Join Date: Jul 2007
Posts: 9
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Mortimer49735 is on a distinguished road
I thought I had read an article somewhere that suggested if you switch to LED's you needed to reduce the fuses on the lines as any short was not quickly picked up due to low wattage by old circuit breakers. I believe article was referencing a home electrical system rather than a marine application. I know nothing about electrical systems so perhaps a more informed person could respond.

I didn't buy the heat issue as a reason to avoid LED's either.
Reply With Quote Quick reply to this message Share with Facebook
  #16  
Old 05-25-2009
tdw's Avatar
tdw tdw is offline
Super Fuzzy Moderator
 
Join Date: Oct 2006
Location: Sydney Australia
Posts: 14,942
Thanks: 5
Thanked 81 Times in 75 Posts
Rep Power: 10
tdw is a jewel in the rough tdw is a jewel in the rough tdw is a jewel in the rough
LED lamps do produce significant heat but as has been mentioned it's not from their light output but internally. We use a lot of strip LED lighting in our business and know that it is wise to mount them on a thin aluminium extrusion in order to help dissipate the heat.

The highest output LEDS that we use to replace dichroic halogen lamps (MR16s) all have large heat sinks behind the pins. Testing we have done on LED lamps without the heat sink has shown significant failure rate far below projected lamplife.
__________________
Andrew B

"Do you think God gets stoned? I think so... Look at the platypus." Robin Williams.
Reply With Quote Quick reply to this message Share with Facebook
  #17  
Old 05-26-2009
Zanshin's Avatar
Senior Member
 
Join Date: Aug 2006
Location: Germany
Posts: 2,208
Thanks: 0
Thanked 15 Times in 15 Posts
Rep Power: 9
Zanshin is on a distinguished road
Wombat-san - do LEDs that use a Buck Converter still produce much heat at nominal 12-13V voltage? The ones on my boat seem remain cool to the touch (unlike their predecessors, which had resistors) when I use them; but they are somewhat pricey ones.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Quick reply to this message Share with Facebook
  #18  
Old 08-18-2009
Junior Member
 
Join Date: Feb 2007
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
wilko is on a distinguished road
I've replaced my all my internal lights, the mast head and tri-colour with LED's from Jeff at Replacement LED bulbs for your existing boat fixtures and was very pleased. Had the mast lights switched on while I was up top as I didn't fancy two trips up a day, they worked perfectly and no noticeable heat problems, there is a lot of space for cooling.

The internal lights are high output 120 lumen "light hammers" and they certainly get warm, they do have a heat sink, but are much cooler than the 10w power hungry halogens they replace.

No affiliation with the Company other than being a pleased customer.

Who thought it was a good idea to put halogens on yachts ? fluorescent is a much better, more battery friendly solution, but LED technology seems to be moving at such a pace hopefully halogen bulbs will be one for yacht design history.

Last edited by wilko; 08-18-2009 at 01:16 AM.
Reply With Quote Quick reply to this message Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
LEDs afloat GoodOldBoat Good Old Boat 56 6 Days Ago 02:23 PM
LED Bulb Comparison !!! Maine Sail Gear & Maintenance 61 08-03-2014 09:18 PM
philosopher's club, anyone? HoffaLives General Discussion (sailing related) 91 03-26-2009 01:44 PM
My learn to sail experience! merlin2375 Learning to Sail 13 05-30-2008 11:08 PM
LED Replacement Bulbs Shack Gear & Maintenance 8 02-13-2007 09:10 PM


All times are GMT -4. The time now is 08:01 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.