Questions about heat and light

[Kikary]

A terrarium should never be placed where sunlight can directly shine into it, think hot-car-in-the-sun-cooking-your-animal.

Ball pythons do not need much light as they are nocturnal critters. In the wild they live underground during the day and they come out at night to hunt.

What did you use to seal the OSB?

The sunlight doesnt "directly" shine on it since i have a quite thick curtain on the window that i never open it and its a bit diagonal from the window so only less than half of the terrarium gets "direct" light from the window , is that alright?
When you say sealed you mean with silicone? i havent sealed it yet since im waiting for my thermometer/hygrometer to measure everything to see if the reading are off. if temperature and humidity are constant do you think i still should seal it?

thanks!!