are you still running your lighting off technology from the dark ages?
Lightbulb technology began around 1800.... The ones you have in your house were invented in 1880.
Don't worry though, the prices you are being charged for those bulbs are very futuristic.
You are paying about 75% more in electricity than you need to for those puppies and replacing them far more often than you need to.
Use this chart to help you work out what to replace with.