One other thing... when my batteries were  charging on the charger after 
I'd been away from the boat for a month,  the voltage initially approached 
14.2 volts. Before I used the buck  converters, I measured the temperature of 
the LEDs with a temperature probe in contact with an LED. It approached 182  
degrees F, much to hot. This temperature will dramatically shorten the LEDs  
life, or cause damage to the circuitry built into the strips, causing 
premature  failure.
 
After installing the buck converters, the LED  temperature (after being on 
for 1/2 hour) was in the 100-110 degrees F range as  best I recall. Ambient 
temperature in both cases was about 80 degrees F, and  these are high-output 
LEDs. 
 
Part of the problem with these strips is that  they cannot/do not have 
effective heat sinks to dissipate high temperatures.  This is even more of a 
factor with the newer higher-output LEDs being  used.
 
Bill
 
MYSTY
Landfall 39
  
____________________________________

From: bria...@aol.com
To: cnc-list@cnc-list.com
Sent: 6/28/2013  8:13:29 A.M. Eastern Daylight Time
Subj: Re: Stus-List LED cabin  lights



Rich,
 
I replaced all the recessed light fixtures on  MYSTY with LED's that I 
made, using the cleaned-up carcasses of the original  fluorescents, some very 
bright double-wide  LED strips, and buck voltage converters. 
 
I used buck converters (that's really what  they're called) that I found on 
eBay. They serve the same function  as the devices your link describes. I 
bought 5 at a time, and paid  approximately US$10 for all, including shipping 
from China.
 
I then, using an adjustable DC power supply,  connected the completed 
converted lights and set the converters. I set the  converter output to 12 
volts 
when the input voltage is 15.0. The net result is  slightly less light 
output at voltages lower than 15.0, but the LEDs are  protected should the 
voltage go that high.
 
Only one issue to be aware of. The converters  DO NOT tolerate being 
connected with "+" and "-" inputs reversed. Don't ask  how I know....
 
Bill
 
MYSTY
Landfall 39
 
 
 
 
 
 
In a message dated 6/28/2013 7:31:03 A.M. Eastern Daylight Time,  
r...@sailpower.ca writes:

http://dx.com/p/car-150w-dc-8-32v-to-9-46v-voltage-boost-converter-regulator
-for-laptop-blue-206971?utm_rid=95527470%2C95527470&utm_source=shopping&utm_
medium=pcs&utm_campaign=paidshopping



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