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Ron, the problem is that we're talking about different things. You're talking about the best case - somebody who knows what they're doing and doesn't cut corners. Most of the people on here aren't electricians, and don't understand the risks of what they're doing. They aren't building things...

No, this is not fact. A 60watt bulb in an open space properly vented does not get hot enough to cause a fire. A 60 watt bulb inside the sort of "fixtures" that these people are building most certainly does get hot enough to cause a fire. A 60 watt bulb inside a cinder block or wooden box with...

Everything we're talking about is a purely resistive load - it's really easy to compare efficiency. In-water heaters have higher efficiency because they have 100% heat transfer - they're sitting in the medium they're trying to warm. There's no energy lost through light bouncing out, no energy...

TractorSupply (and several other resellers) all have models for under $30. Tractor supply even sells a waterer with a heater built in, with armored cable for less than $30. It has a thermostat, and is designed to shut off if it gets too hot. Or you can buy an aquarium heater for $10 - which...

Remind me again, why do so many people seem to prefer the lightbulb over the significantly more efficient, less dangerous, aquarium/watering trough/water heater element based designs? You can buy a good trough heater for $25, and it's going to use less electricity, and it's not going to start...