Kale is bad because it contains calcium binding oxylates. I would never feed it or spinach. Carrots are High in Vitamin A which is bad for beardies so I would only feed it once in a while at most. The link I provided in the last post explains both of these.
MVB. I am not a believer in these at all. I own the Zoo Med Powersun 160 and 100 watt flood. They just don't put out much heat. The bulbs get real hot but really provide very little heat.
It's important that a MVB be one that is designed for reptiles not just a MVB standard bulb. Since the only plus of MVB's is the UVB output is greater than the flourescents. The downsides are they should be 2' away, and they must hang facing straight down.
It's hard for me to tell you how to solve your temperature problem without a little more information. What kind of enclosure is it? It's not a screened open air is it? Or is it a glass aquarium with a screen top? Or maybe a vision cage or something home made? How are the lights mounted? If I can visualise why you are not getting the right temps, I or others may have a suggestion.
I don't know where you live so it's hard to give an answer on night time temps. too. But if your house stays above 65 then you don't need to do any night time heat.