Whoa. A heat light is pointless, as you will probably very very rarely ever see your kenyan. You need to get an UTH controlled by a thermostat, or a dimmer switch, and set it to a certain temperature, somethign not to hot, because your kenyan will either lay on it or around it at the bottom of the tank. The heat lamp & red heat light are a waste of money(not sure who told you to get them). Aspen is fine, It's alot better then sand as sand gets really irritating to clean, and really hard actually, because the kenyans will defecate at the very bottom of the tank. Get rid of the lights definately and get an UTH, you can even do an UTH like I did on both sides, a bigger one for warm, smaller one for cool, set both on a dimmer switch(seperate) and keep the smaller one turned down more then the warm one. Make sure of the temperatures though as you don't want your snake to get burned. If it's a baby kenyan then your 10 gal is fine for now. Also just keep the tank up higher and the temperatures should regulate themselves.