What type of bulbs should I use to replace the ones in my house?
It really depends on the application, and what you expect the bulbs to do. In most cases we recommend switching to LED bulbs. They have come down a lot in price, you can get dimmable versions, they run the coolest, they last much longer than anything else, and they are the most power efficient style on the market. They will pay for themselves over time.
The other option for efficiency is compact fluorescent [CFL], which are almost as efficient, and slightly less expensive. However they are an older technology and are not well suited to cold temperatures, and can have issues with dimming.
The last option is the traditional incandescent or halogen type bulbs. These are the cheapest option; however they give off a lot of heat, and are not even comparable in efficiency to LED. However they tend to have to best dimming characteristics, and give off the warmest light.