Hi Jenni. Russians do not require a moist substrate. They originate in arid countries. All they need is drinking water and an occasional soak to keep hydrated.
Hi Adamkenn. Welcome to TFO.
I'm not an expert, having had my 2 Russians for just over a year, but as near as I can tell this is "Normal" procedure for them. BTW, mine are both adults.
Good Luck.
You don't want or need a night light. They need dark time also. Unless your night time temps get below 60 deg., don't worry about heat. That's a nice looking Russian (Steppe).