Incandescent bulbs use a little more energy than fluorescent bulbs. Using fluorescents ostensibly reduces the amount of power rpoduced by a power plant and therefore reduces carbon. However, fluorescents don't produce heat, and though you may think that doesn't do much, try a Minnesota morning in a tiled bathroom with no warm bulbs. Then you turn up the heat, and a furnace being on longer uses a heck of a lot more energy than a light bulb. Also, fluorescent bulbs contain mercury, they will always contain mercury, and it is often difficult to find a place that will take burned out bulbs.
I guess my whole point in this whole thread has been that modern man uses energy. Unless we adopt an Amish lifestyle we will continue to use a lot of energy. Education campaigns encouraging energy conservation are the best ways to get "the masses" to pay attention to the world around them and leave the earth a little cleaner when they leave.