Be sure to keep an eye on the temperatures (like that in their natural location):
http://www.worldweather.org/185/c00356f.htm#climate
When kept indoors in a terrarium, temperatures increases with the wattage.
But Cephalotus likes relative chilly temperatures, compared with average room temperature.
If kept too warm, pitchers will stay more green in the long run.
If kept chillier, pitchers will show nice red (at the same amount of light).