Are Energy Saving Light Bulbs... Really Energy Saving?

This question came up at my work. The initial answer was,,, well obviously, they use less energy than standard light bulbs, that's the whole point of them. Then the following was said... standard light bulbs give off a LOT of heat into the room they are in, energy saving light bulbs do not give off heat. Using energy saving light bulbs may well mean that central heating is turned up (to keep the room warm). The increase in energy used (and increased cost) of turning central heating up may mean that in fact MORE energy is consumed (and money spent) by using energy saving light bulbs than by using standard light bulbs, that give out both light and heat.
What do you think?

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