if you think the problem is vibration you can buy "ruggedized" bulbs at your
local discount department store. I bought one for the trouble light I use
when working on the car after a couple of the regular household bulbs went
out. the ruggedized bulbs cost a bit more.

Tom Best ) writes:
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


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