Okay I will be gone for about 2days but I was wondering if its okay if I leave my lights on for 2days stright reason being is that I dont have a timer.
I'd just go buy a cheap timer at walmart or something. If you can't do that, I'd just leave the lights off instead. The corals can deal with no light for 2 days without any major issues and the extra light could be too much for them or could cause algae to grow.
It's kind of like a cloudy and rainy 2 days on a reef. It doesn't harm anything. You might want to leave a blind or curtain open though so there's at least a little bit of a day/night cycle.