Do you have a better citation than Yahoo!? Because this one offers absolutely no explanation. And since it flies in the face of what I know about conservation o

Do you have a better citation than Yahoo!? Because this one offers absolutely no explanation. And since it flies in the face of what I know about conservation of energy, I think it needs a pretty darned good explanation. You'll note that your citation says "energy costs", rather than "energy consumption". This is likely true because the cost of energy is higher when delivered in the form of electricity than when delivered in the form of fuel oil. But that's a pure cost saving question. It says absolutely nothing about how "green" this is: the net effect on the environment of using the two types of bulbs independent of costs. There is the possibility that the heat generation by my furnace is much more efficient than that from the electricity by way of the bulb, but I doubt that is significant (unless I have a heat pump and live in a temperate area where that can work very well?).