Unless thou art Ti-Guy, Miss Vicky, or JimBobby, who already knew about these environmentally friendly "compact fluorescent" bulbs.
Approximately $8.00 at Home Hardware for two of these suckers, but they're supposed to last for years (four, according to the box). Read more at JimBobby's or here, but the short version is that these babies use way less power and cost fewer pounds of CO2 to make, yet produce the same amount of illumination. The light is alleged to be a bit harsh, but I've got the one pictured here up in our bathroom now and it seems fine behind its glass fixture. Takes an extra second to turn on, but otherwise you can't tell the difference.
And I don't agree with the opinion that the bulbs themselves are "ugly"; in fact, they seem rather elegantly shaped. The only downside I can see is if you were to drop your $4.00 light-bulb on the floor while installing it. At that point I could see people telling the environment to go fuck itself.
God I feel righteous this morning! If anyone else uses these, drop a line in comments and we can feel righteous together. In fact, I sense a group "smug" coming on.
PS. Funny how things go. The Star is running a story just this morning on the reception of compact fluorescents in the Canadian marketplace.