I'm not sure exactly what you're asking. But, I work 12 hour shifts, and I eat basically the same on night shift as I do on day shift. I eat every 3 hours, and try to balance protein / carbs and fat.
I usually go to the gym after nightshift, so I have a protein and carb shake towards the end of the shift, and another one after my workout. If I don't workout after work, I don't eat. But if you're just going to bed, and you want a pre-bed snack, I'd just use low-carb protein powder.
Hope that helps.