{{form_timer_duration.duration_on.label(class_='control-label')}}
{{form_timer_duration.duration_on(class_='form-control', value=0.0, **{'size':'6'})}}
{{form_timer_duration.duration_off.label(class_='control-label')}}
{{form_timer_duration.duration_off(class_='form-control', value=0.0, **{'size':'6'})}}