Thought this might be of interest.
I have 4 40L tanks set up this way. Lighting is by 2 120cm shop light sets (2 tubes per set). Heat is by 50W aquarium heaters in submerged in the water.
From the front
From the side
With the access panel
Access panel removed
Close up on the access panel. To make these I just use window screen material and toss a piece of plastic along the sides (if anyone wants a better explaination on how to make one I can give the details.)
And a graphic on how the air circulates. The red arrows show air flow. Cool air comes in the bottom and hot air out the top. If you look at side view with the access panel in place you can see condensation on the top.
A different tank (more plastic so higher humidty) but it shows well how the air flow runs. Where there is free access to the screen the glass remains condensation free, where the airflow is impeded by plastic there is condensation.