Please note this has been modified from the original post:
My cephs are about 8 inches from 6-40 watt flourescent bulbs. They get about 15 hours of light a day. Humidity levels are above 70% as the pots are in gallon size ziplock bags.
I use to grow a ceph in a greenhouse window that faced East in high school, and later my first two years of college. This was kept in a pot covered with a clear plastic dome. The plant was protected from direct sunlight by placing it on the lower shelf and which was partialy shaded by the pots above.
I have noticed that my cephalotus grow best when the humidity and light levels are high. I have done this by growing them in partialy sealed containers.
As an example:
I bought two cephalotus plants about 4 months ago. Each was potted in a 4" pot and placed in an open top terrarium. My hopes were that the plants would get enough humidity without having to enclose the terrarium or keep them in sealed containers. However, after 2 weeks, the typical cephalotus began to turn black and die. The other, Giant Form, was not showing the same signs, but has not improved from its initial planting. Taking by previous experience with a covered or sealed growing environment, I placed each in a gallon sized plastic bag and put each in my basement were its a bit cooler. Right now, the Giant Form is putting out a trap that is twice the size of the original traps and the typical form has produced a clump of leaves without traps. If I had not done this, I believe each plant would have died.
During bog visit, I happend to learn that Bio Ohio was going on the same day I was making my trip. Bio Ohio was on my way to the bog so I popped in in hopes to see my college professor and the greenhouse manager. I lucked out and got to spend some time with each. The greenhouse manager told me that he had borrowed an idea of mine. This got my attention as I wasn't sure what he had ment. He mentioned that he had trouble growing cephalotus and noticed that I had been growing mine in a mini terrarium (my covered pot of cephalotus). He has since built a special sealed terrarium with custom lighting for his cephalotus. He told me the plant is doing very well and only needs watering a few times a year. My witness to this discussion is Ozzy as he was there as well and enjoyed a nice mist with the L&B West Greenhouse's new misting system.