yeah, that would be fine for a full grown corn snake. those are the measurements for roughly a 29g breeder tank 30"Lx12"Dx18"H, which is what I have my 7 year old ghost corn in. As for the heat lamp, I personally dont use those, I use UTH's for my two corns. And you can regulate the temp for those with a thermostat. Have fun with your new aquisitions. If you have any other questions, just post em or send me a PM.