Some advice please, my 2 year old hermann is staying in a specific corner all day and all night, i relised that in the morning she is quite cold so i went to the shop and asked for advice and they told me to buy a dark spot light which would keep her warmer at night i also bought a devise that helps contol the heat and keep it at a steady heat that i want it to be at , is it possible to only use this dark spot light and the uv light or do i need to keep the spot light aswell.