JimH,

This is exactly what I need, it uses one tenth the power of a 12 volt bulb.

I saw that there were some all around LED lights to replace the 12 volt
bulbs, but they were substantially more expensive, and only saved 1/2 the
power.

I forgot to mention that the Gel Deep Cycle battery also powered the
refrigerator, so that is probably why it always died during the night.


" JimH" wrote in message
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"Reggie Smithers" wrote in message
...
JimH,

I have a deep cycle gel battery, When I use my anchor light, it has never
made it through the night without being completely discharged. Is this
normal?


" JimH" wrote in message
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"Eisboch" wrote in message
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" JimH" wrote in message
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"Bill McKee" wrote in message
.net...

"Eisboch" wrote in message
news
wrote in message
ups.com...
First version, otherwise why use 6 resistors instead of one single
lower ohmage one of higher power.


I was trying to roughly calculate the power requirements. You said
600 ohm resistors, correct? The voltage drop on the LED will be
minimal when forward biased or "on", so each branch must be about
.02 amps, times six equals .12 amps, so the power must be about 12v
times .12 or about 1.4 watts. Probably a bit more when you factor
in the LED drop, whatever it is. Significantly less than a regular
light bulb!

Eisboch


Most LED's are in the 400mw range.


How about the standard 12v bulb used for anchor lights?

I don't know what their wattage rating typically is. My guess would be
somewhere between 10 - 20 watts, given that they are required to be
seen, what, 2 miles away at night?

Eisboch



What is the benefit for a boater on the hook overnight besides having a
brighter anchor light? Is there a significant less draw on the house
battery over a 10 hour period?







I never had that problem.

Something you can consider is a portable anchor light such as this one
http://tinyurl.com/akeg7