As long as the infrared energy of a light source does not seem to be at work here, maybe a cheap heater would be found in the low-cost hot melt applicators that use PTC devices. No controller, no thermostat, comes all ready to plug in and could be banged around some without breaking. Wattage values are somewhat iffy in that it depends on how it's loaded. Nominal 80 watts here:
http://www.glu-stix.com/shop/page/product_detail/Product/0c202020a6b0e7357466c3c4c416bb67.html
Walter
Just a comment about light bulbs... Incandescent bulbs (ie, not florescent, CFL, LED, etc) are a pure resistive load. In other words, they are not indictive or capacitive. Therefore they make pretty good heaters for enclosed spaces. A 100 watt bulb, will supply 100 watts of heat to an enclosed space. Some of that (more than you might guess) is directly produced as heat while the rest of comes away from the bulb as light. That light, however, then gets absorbed by "stuff" in the space and gets converted to heat.
I would still recommend buying parts designed to be used as heaters such as the one you recommended because light bulbs can easily get broken and they burn out, but light bulbs do work as heaters.
Pat
--- In electricboats@yahoogroups.com, "Reid" <axius@...> wrote:
>
> Jim,
> That is the perfect part for the job. Most people don't seem to >realize that you want a pure resistive load to generate heat, not a >light bulb.
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