Snakes need some light, but a bright light will stress them, especially when it's suddenly on.
So you cannot see thru the sides of this tote at all? That's not a good plan, sorry- it means you'll have to open it every time you want to check on the snake- which is something you'll need & want to be doing fairly often. This set-up is very likely to stress your snake into not eating- even with the right temperatures. Snakes are shy, especially BPs- and they are MOST afraid when we approach them...this is instinctive on their part.