Any ideas or comments on these failures appreciated.
In the time I've spent as an Aviation Electrician, I've seen incandescent
bulbs fail for many reasons including: vibration, exposure to temperature
extremes, poor quality construction, over voltage, and "hot spots" caused by
fingerprints on the globe.

If you can eliminate most (or all) of these causes, I'd expect your bulb
life to increase.

My 2¢


(¯`·._.· £ãrrÿ ·._.·´¯)




"Tom Best" wrote in message
om...
I would appreciate some help with a 12 volt question.

I set up a 7 light long string of 12 volt, 40 watt bulbs on a strand
of 12 guage, outdoor lighting, copper wire. The bulbs and bases were
standard Edison screw base types. The lights were connected to a 300
watt DC converter made for outdoor yard lights. In theory, I would
like to take the same string (with lower wattage bulbs) on sailing
trips.

In 4 days, 6 of the seven lights have burned out. One light continues
to burn at normal brightness.

Any ideas or comments on these failures apprecitated.

Thanks
Tom