Heating questions

[Blueiggy]

Hey guys, just got myself a baby corn snake. Havent had one since my old boy died 10 years ago. Also, was still a dingbat teenager and had no clue about heating. Everything was set up from my breeder of a cousin. This being said, my little one here is currently in a 10 gallon. The temp is hovering around 71 which I know anything below is really just not good for them. For this size tank, what do you guys suggest heating lamp wattage wise and also, in my room it's dark due to insulated curtains (it gets about 67 degrees in here come winter at best) so would you guys advise some sort of day light as well? Mind you, I'm trying to get a hood lamp, the ones that rest on the metal hood that is, not the bowl shaped ones. Thanks a bunch!