Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 04-12-2008, 20:27   #16
Registered User

Join Date: Sep 2008
Location: Camden, ME
Boat: A Thistle and a Hallberg-Rassy 36
Posts: 664
Whitel LEDs are very deficient in the red wavelengths, unlike incandescent bulbs which have a large preponderance of red wavelengths. As a result, putting a red filter over a white LED will give you a red light, but not much relative to the power being put into it. There is a fair amount of green emitted from a white LED, so filtering it with a green lens does not punish light output as much as a red filter.

Even though red and green LEDs do not put out as many total lumens per watt as white LEDs, the red and green ones are emitting all of their light energy in very narrow wavelength bands of red and green and so are much more efficient producers of the desired color whether behind filters or not.
__________________

__________________
SoonerSailor is offline   Reply With Quote
Old 28-01-2009, 07:13   #17
Registered User
 
Captain Jaz's Avatar

Join Date: Jan 2009
Location: The Ocean
Boat: Bruce Robert 360 - 36' Steel Junk-Rigged Schooner
Posts: 355
Images: 17
Marine Super Store

The top of the list is a fine example of the power you'll save... 20w mast light, replaced with 3.5w of LED's!
Not to mention durability and longevity to boot!
__________________

__________________
'Anyhow, a philosophical turn of thought now was not amiss, else one's patience would have given out almost at the harbour entrance.' ~ Joshua Slocum
Captain Jaz is offline   Reply With Quote
Old 28-01-2009, 08:11   #18
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2006
Posts: 1,594
The best I've found are from Sailor's Solution. Available in red or white and dimmable via their mini dimmer switch. I also have several from Dr LED and the SS version is noticably brighter. Looking directly into them is similar to looking at the sun!
__________________
Randy

Cape Dory 25D Seraph
rtbates is offline   Reply With Quote
Old 28-01-2009, 08:19   #19
Marine Service Provider
 
Maine Sail's Avatar

Join Date: Jan 2007
Location: Maine
Boat: CS-36T - Cupecoy
Posts: 3,060
Guys please do not use non-certified LED bulbs in existing fixtures!!

There is only one company who has spent the time and money to have their LED bulb USCG certified in another manufacturers fixture and that is Dr. LED. When Dr. LED Polar Star 40 bulbs are used in AquaSignal series 40 fixtures this is legal and certified but ONLY in Aqua Signal series 40 fixtures..

The reality of aftermarket visibility & distance vs. the actually USCG certification means diddly with lawyers. It would be up to you to prove your particular combo was safe, could be seen, and met all the beam angle & color requirements. That gets awfully expensive and would certainly run more than the cost of a legal USCG certified bulb, like a PolarStar 40 for a given fixture.

Trust me the lawyers will care if you get in an accident at night. In almost every night time case the light fixtures are examined and the bulbs are compared to the certification data, at a minimum. If you have a non approved or non-certified/tested bulb for that fixture installed the lawyers will eat your for lunch and you'll have to prove them wrong because the law and precedent is on their side.

In order for Dr. LED to get approvals on it's bulbs in Aqua Signal 40 series lights they had to buy the fixtures, install their bulbs and send them off for certification. As of now, unless there is some other company that recently did this, this is the ONLY legal way to install aftermarket LED's into existing fixtures.

Court cases are getting very scientific these days. There was a recent case in California where they used forensics to determine if the bulb filament blew as a result of the high speed collision, when it was on, or if the filament broke when it was off. The way a filament breaks when warm differs from the way it breaks when cold. With forensics they can determine if a bulb was lit prior to an accident or not. Even if you flipped the switch on after the fact, to cover your butt, they can tell these days. If it had been a non approved LED it would have saved them a LOT of money on forensics costs and you would have been toast. This CA case involved a death! If you don't think this can happen to you then your being naive.

If you get into an accident with a guy richer than you, or with better insurance, and at night, you can almost guarantee they will be dismantling and inspecting your running lights.

One of my best friends fathers was killed on lake Winnepausakee in NH in 2002 and it was a HUGE, high profile NH court case. They were run over from behind by the son of a local marina owner. The defense tried to say John's running lights were not on at the time of the accident, which was not true, and it became a large part of the case. Their boat was was held for evidence for well over a year during this trial and case. If you don't think it happens think again I have had it impact me. We just had a similar case here in Maine and the running lights were a HUGE part of that defenses case as well!

Here is the exact wording from the trial:
Quote:
Quote:
Originally Posted by State of NH vs. DJL
During the post-collision forensic investigation, Maurice Boudreau, a consultant with the State Police forensics laboratory, examined the stern light. He testified that the light was still operable, but that the lamp filament showed signs of "mild hot shock," or distortion.
Don't be penny wise & pound foolish..

Dr. LED Polar Star 40 (LINK)


From a pres release:

"Seattle, Washington, December 18, 2006 – Dr. LED today announced that it’s White Polar Star 40TM after-market replacement LED light bulb for the Aqua Signal series 40 anchor light has been certified by a U.S. Coast Guard (USCG) accepted independent laboratory as compliant with the USCG COLREG 1972 (International Maritime Organization, “IMO”) standards and verified to be in conformance with the navigation light regulations of ABYC A-16. This is the only after-market navigation replacement light bulb that has received such certification."

As of right now I do not believe anyone has a USCG certified LED bulb for stern, bow or tri-color lights only the PolarStar 40 for anchor.
__________________
Marine How To Articles
Maine Sail is offline   Reply With Quote
Old 28-01-2009, 09:13   #20
Registered User
 
Captain Jaz's Avatar

Join Date: Jan 2009
Location: The Ocean
Boat: Bruce Robert 360 - 36' Steel Junk-Rigged Schooner
Posts: 355
Images: 17
Thanks Maine Sail, thats something I hadn't considered...
__________________

__________________
'Anyhow, a philosophical turn of thought now was not amiss, else one's patience would have given out almost at the harbour entrance.' ~ Joshua Slocum
Captain Jaz is offline   Reply With Quote
Reply

Tags
navigation

Thread Tools
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 Bulbs Polarity Sensitive Ron_Fran Electrical: Batteries, Generators & Solar 4 14-07-2008 18:06
LED bulbs for nav-lights… dcstrng Electrical: Batteries, Generators & Solar 5 12-06-2008 12:35
LED bulbs irwinsailor Marine Electronics 51 18-11-2007 13:41



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 12:42.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.