Doesn’t sound goofy at all – it’s a good idea! I worked midnights for about 20 years, and I would pack a decent lunch to take with me to work, which I would eat around 2 a.m. Sometimes it was leftovers from supper, sometimes it was typical “lunch” food – soup & sandwich, that sort of thing, but it was always something more substantial than just a snack. Otherwise I would “graze” all night on junk food from the vending machine, and that’s bad for one’s health and one’s weight. I managed to get myself completely off caffeine while still on nights (I had to do that for health reasons), and it wasn’t easy, but it also wasn’t impossible.
Definitely pack your lunch. Treat it just like you would a noon day meal. Techinally speaking, for you it will be your noon day meal.
My dh is currently working a night shift. It’s 10pm here and he is currently at work. One thing I found is it can be hard keeping the kids quiet during the day while he is sleeping. And for anyone who ask NO sending them outside to be loud does not work because he can still hear it!
Having worked the night shift myself I can sympathize with dh and so I tend to really stress to the kids that they need to be quiet because daddy needs his sleep. For those wondering, no, I do not ask them to whisper but kids, for some strange reason 
, tend to be naturally LOUD. Or at least mine are. Unless of course this job already requires him to do that. The job I worked and the ones dh has worked require you getting a fairly decent work out just moving around in one place (in my case, I was a packer) and walking (in dh’s case, he is in maintenance).
My dh also loves the night shift. The night shift tends to be more peaceful than the day shift. A lot less big wigs means a lot less politics going on and he hates politics.
It is hard but I actually see more of my family on the 12 hr. nights than I would on 12 hr. days. And, there is less politics and administrators at night:thumbsup:you need the energy when you are working, so eat that way, have a good balanced meal on your break. my problem was the job did not allow for regular breaks, a solid half hour to sit down and eat, so I developed bad eating habits which still plague me. do whatever you can to eat a good breakfast before work, a good balanced meal on your mid-shift break, and a lite supper type meal when you get home, plus nutritious lite snacks on breaks, and eat properly, seated, chewing and swallowing not gulping, paying attention to your food, not doing other things. trouble with coffee is it always seems accompanied by snickers (or cigarettes). no matter what shift you work too much caffeine equals poor quality sleep. Oddly enough I did not drink coffee at all in those years, never started til I went to grad school.