Table 1: Daily experimental test procedure for each horse with respective location (pre-, light- and post-box, alley) and recorded behavioural or physiological parameters at given phases or measurement times.

	Pre-phase		Light-phase		Post-phase
Location	Pre-box	Tied in alley	Light-box	Tied in alley	Post-box	Tied in alley
Time [min]	0 - 20	20 - 25	25 - 45	45 - 50	50 - 70	70 - 75
Behaviour			x
Elimination	x		x		x
Activity (ALT-Pedometer)	x		x		x
Heart beat parameters (Polar®)	x		x		x
Body core temperature (Microlife Vet-Temp)		x		x		x
Body surface temperature (FLIR Systems)		x		x		x
Salivary Cortisol (Salivette®)				x