Lol not a stupid question at all...I don't know much about them really compared to lots of people on here...but yes they are a nocturnal species and she was only out because I had just tidied up her viv a bit and put her back in. And your right she would take anything on if it went in her viv lol!!
My observation is that Leo's become active at around 5:30 - 7 and stay up till they choose to go back to bed.
How ever.... My new Juvi Supersnow has caused me to re-think that theory as she is up during the day time and silly o'clock when I get home off my late shifts at work, which is usually 0100 hrs - 0300 hrs.
lovely gecko. 2 of mine are often out in the day, my super snow male does his I'm a pancake impression flat out on the hot side, and my mack female sits on top of the moist box watching all the goings on. Other 2 dont come out till feed/clean time about 7. Little fatty only seems to get up for food, lazy thing lol