Yes you do but keep your do open it need to have room tempreture in winter still keep it open but put some hay in just to be sure.
Dec 25, 2009
Russian tortosie heat lamp by: Shelly
Your tortoise needs two lamps. One provides heat. One provides UVB rays. The UVB lamp should be off at night. The heat lamp should provide a daily basking temperature of 90 degrees. The tortoise needs a low temperature of 70 degrees when he becomes warm enough from basking. At night the temperature can drop to the 60s. If it gets colder than that, it won't be able to digest its food properly.