Setback hermostat with Radiant Heat

I'm wondering if it would be best to use a set-back thermostat with radiant heat. Currently all the rooms have bamboo flooring and it works great. However, the thermostat is set at a constant 69. Some of the rooms are only used for 2-3 hours once a day. Does anyone know if it would be more economical to turn the heat down some when they are not in use?
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