: I've always used only the light bulb, but I like the fan idea. On 40ºF
: nights, the ends of the kayak maybe get to 55-60º, while the area near the
: bulb is 80-90ºF. (with plastic covering any openings).

: Shawn

I already have a small room heater with fan, but that thing uses at least 1000 Watt of power. That`s way too much for this purpose and I need it over a period of hours or even days. The secret of the "1-lightbulb-idea" seems to be the even distribution of the heat. A lightbulb with glass covering (available for car repairs) will cost not more than $10. I will test that tomorrow !
-Joachim-