Thanks Tom,
I use a Arcadia tube on a timer for 14hours would this be ok? Or should I change to the MVB
You need three things from your heating and lighting strategy:
1. Heat
2. Light
3. UV
WIthout knowing how much UV your Arcadia bulb is putting out in your enclosure at your mounting distance, I can't make a recommendation for how long to run it. I only run mine for about four hours a day to simulate what happens outside. UV levels are much lower in the morning and late afternoon, but quite high mid day. Because I only run the UV bulbs for 4 hours a day, I run a regular hardware store type florescent bulb on the same timer as the basking bulb so they have light all over the enclosure all day, again, to simulate what happens outside. I run the basking bubl and florescent lights on one timer for about 12-13 hours a day.
For Testudo species that need cooler nights and do well with lower ambient temps, I use only the above stuff with no supplemental heating. For tropical species like leopards, sulcatas and stars I use CHEs set on thermostats to maintain a warm ambient temp 24/7/365.
There are many ways to accomplish the things we need to accomplish as far as providing the correct temperatures and lighting, but these are the main points to consider. Because your tortoise will be inside most of the year, you really need a UV meter to insure that your UV bulbs are meeting your tortoises needs.