Hi everyone, I need advice with a planned light change in my indoor enclosures. After reading many articles on this forum saying MVBs are not ideal, and fluorescent tube bulbs are better for UVB with a flood light from the hardware store for heat, I'm ready to make the change. Tom's comments especially have stood out and really encouraged me to want to make this change. My 4 box turtles and 1 Russian are under MVBs while indoor for 8 months out of the year, they get to live outside for 4 months as we live in Ohio. (They all live in separate enclosures before anyone gets too upset. Some of them would would kill each other if they lived together! I cringe when I read the "I want to get my turtle a friend" posts on here, but I'm rambling.) But they have had these types of bulbs for almost 15 years, changed every 6 months. My concern is that such an abrupt change might be upsetting to them visually and cause them to possibly stop eating or soaking? Should I maybe change just the MVBs to flood lights first, then add the fluorescent bulbs a few days or weeks later? All 4 turtles are over 20 years old, and the Russian is over 30. They are all in excellent health and are currently eating well. I am a registered vet tech married to a veterinarian and sadly, we received ZERO exotics education in school. Thanks to forums like this and also to people like you all who have loved their own turtles for decades, I can get reliable information to take care of my own pets and pass on to my clients in my animal hospital. Much thanks!