Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 25-03-2008, 21:27   #46
Registered User

Join Date: Mar 2008
Location: Wasilla, Alaska
Posts: 121
To really make the best usage of say an emergency light is to use a dc/dc converter, the lower the battery voltage the more it draws from the battery, these are relatively common in the better brands of LED flashlights now, what it does is say you have a single 3 volt lithium battery like I have in my Surefire, the converter ups the voltage to 3.6 volts at 40mA, when the battery gets weaker it compensates and still maintains the same voltage for the LED, a regular bulb as the voltage decreases DRAWS more current, and LED's works the opposite, the lesser the voltage the less current it draws.
what you have in the end is a flashlight that practically will never get dim, it will suck every last bit of voltage from a battery and keep that LED lit.

I'm saying this BECAUSE, yes you can wire simple LEDs with either individual resistors or wire them in series to a boats/RV battery system and its a moot point because you have that huge massive battery. A really good compact $150 flashlight like mine I can turn it on 20 times a day for a minute at a time for inspection work and I replace the single 3volt lithium battery on average once every 4 months. Its a Surefire. LEDs is great, shockproof, explosion proof, cold for the most part though the new hi output ones do get really hot and the best part is that the LED draws so much less than a regular bulb, can be turn on/off a million times and if LEFT ON continuously will only dim 20% after 100,000 hours (11.3 years).


Silverado6x6 is offline   Reply With Quote
Old 25-03-2008, 21:48   #47
Senior Cruiser
Alan Wheeler's Avatar

Cruisers Forum Supporter

Join Date: Dec 2003
Location: Marlborough Sounds. New Zealand
Boat: Hartley Tahitian 45ft. Leisure Lady
Posts: 8,038
Images: 102
So Wheels, riddle me this:
You say "You must regulate current. "
Yes correct. Yes there is a forward operating voltage threshold. But after the LED begin conducting, it is all about current. It is what happens to the electron to produce a Photon that requires the current to make more electrons produce more photons. Some LED's can have an operating voltage as high as 3.5V Especially the torch type whit light versions. So operating from a battery unregulated is quite possible.


For God so loved the world..........He didn't send a committee.
Alan Wheeler is offline   Reply With Quote
Old 26-03-2008, 08:17   #48
Senior Cruiser
bstreep's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: San Antonio, TX/Port Aransas, TX
Boat: 1990 Macintosh 47, "Merlin"
Posts: 2,277
OK, I know, I'm harping on this...

So I check the link on the LEDs you have. It takes pretty much ALL TEN LEDs to put out the same light as a single Rebel. That's 10X as much soldering, 10X as much room, 10X as much mounting. The price? $13 with shipping. Versus $7 for a Rebel.

The other thing I don't like is the built in or added resistors. Resistors are just electricity wasters.

Bill Streep
San Antonio/Port Aransas, TX
bstreep is offline   Reply With Quote

cabin, led lights

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 Lights and ColRegs Weyalan Marine Electronics 11 03-08-2016 08:57
LED Nav Lights get 'Approval' GordMay Product or Service Reviews & Evaluations 30 03-09-2009 19:57
LED lights ub1 Electrical: Batteries, Generators & Solar 6 24-02-2008 04:33
LED Cabin Lights: They Work Great + A Picture Ambiance Electrical: Batteries, Generators & Solar 42 15-01-2008 19:00
Re-wiring: Tinned or not. Also cabin lights... Weyalan Electrical: Batteries, Generators & Solar 23 02-12-2006 11:29

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 09:20.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.