get a dome light n put it right outside her cage i have a similar situation here in usa what i did was add a xtra dome fixture n 60 watt bulb for daytime to add xtra ambient warmth,then if you got to get 2 60 watt heat bulbs,run one at night when its cold if it drops below 55f turn the other one on,it works best if you connect them to a thermostat like ones you plug 3 outlets into it,then you can set it for the night or daytime easy.alot a time i just adjust the thermostat in the morning and night mine is connected to a electric fan heater that heats the room fast.these heaters are dirt cheap here 10.00$ i also have a ceramic 3 panal heater w/thermostat that is usually the emergency heater cause the thermo is set lower then everything.
at night let the temp drop as long as shes healthy 60f during the day you gotta use your own judgement depending on the weather if its the cold times you can fluctuate the ambients 71f-78f during the daytime then your basking areas will be nice n warm on those days 78f.i let the room cool off during the day 71f for maybe 2-3 days at a time then i gotta warm the room up,especially if their shedding warm the room up n mist the cage .
she looks like a good girl though even with the red heater in her cage.