I love those exo terre tops. I have the 3 fixture ones. Or make my own now a days lol. Those will support a 60w bulb no issue(mine have over a year now). But, put it opposite of the switches. Their switches are kinda cheapish quality. Ugh always cleaning the reflector because of the fogger... Run a 60w zoo med blue and your uvb.
Sounds like a 29g by our standards(grumble grumble metric system grumble grumble).
For the fogger, how is it plumbed in? Add a simple ball valve to the plumbing to cut back or regulate your flow rate maybe? If not a timer would be the way to go... Or for the tech savy a humidistat would just run it for you.