Fancy calculations aside, I'd guess that your 13W flourescent will burn
about four and a half  times as long as the 60W incandescent it replaces
(60W divide by 13W = (roughly) 4.6).

At 09:41 PM 6/28/2006 -0500, Warren Lail wrote:
>Greetings Lubbers,
>
>I know we are having a discussion regarding the power consumption of our
>favorite gadgets, and so I thought I would lend my own experience, which
>is utterly lacking in technical specificity.
>
>I have a small 120 volt clamp-on light fixture in Billy Bones into which I
>screw a 13 Watt GE helical fluorescent bulb.  It gives off a nice
>incandescent-looking light (advertised as equivalent to a 60 watt bulb)
>for a seemingly slight power draw.  I have a small 140 watt power inverter
>and it (and my battery) seem to handle this small drain rather well.  I'm
>not sure how long it would take to run down my battery, but so far no
>problems.  Of course, when shore power is available I use that instead of
>the inverter.
>
>Just my 2 cents, YMMV.
>
>Warren L.
>88 Westy 2.2 "Billy Bones"