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Old 30-09-2012, 05:02   #16
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Re: LED lighting.

Greetings and welcome aboard the CF, Bob.

The advantages of current control (over voltage control) in an LED light, are more consistent light output from unit to unit and a longer, more consistent life expectancy.
LEDs are current-driven devices whose brightness is proportional to their forward current. Their light output and life expectancy are both tied directly to their operating current. The constant-current source eliminates changes in current due to variations in forward voltage, which translates into a constant LED brightness.

So, CC LEDs would definitely be worth it, for "critical" and difficult to access lights, such as anchor/steaming/spreader lights on the mast; and somewhat less so for easily changed cabin "convenience" lights.
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Old 30-09-2012, 06:35   #17
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Re: LED lighting.

Quote:
Originally Posted by Paul L View Post
If you are also replacing fixtures, the best quality over head and reading lights we've found come from Alpenglow Lights Really a nice light from tbeir reading lights.
Very satisfied with the two Alpen glow fixtures we have bought
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Old 30-09-2012, 06:44   #18
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Re: LED lighting.

OK...How do I know a bulb is CC. I have tried one from Super Bright LED and it's been working fine for about a year. I should note my boat is 24V.
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Old 30-09-2012, 06:54   #19
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Re: LED lighting.

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Originally Posted by Sailorman375 View Post
OK...How do I know a bulb is CC. I have tried one from Super Bright LED and it's been working fine for about a year. I should note my boat is 24V.
If it lists a wide voltage range say 10-32v it has some control circuitry and almost all of these are CC.

LEDs with only a dropping resistor are only suitable for a very narrow voltage range. The vast majority of these are 12v only, but there are some designed for 24v.
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Old 30-09-2012, 14:55   #20
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Re: LED lighting.

Many thanks to all of you for lighting up my project, (and my brain).
Glad I found this net.


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