Table 1.

Output of statistical analysis. (a) Interaction between night part (the time of night; evening/morning, split at one hour after astronomical midnight) and light treatment combination (six principal combinations: dark–white, dark–green, dark–red, white–green, white–red, and green–red) on the ratio (success/failure) of bats passing through the corresponding light treatment in either culvert, with treatment orientation (with two levels indicating whether the principal treatment combinations were oriented east–west or west–east), and with night number as a random term. (b) Effect of light treatment combination on the ratio (success/failure) of the total number of bats per night passing through the corresponding light treatment in either culvert

	df	AIC	df	Deviance	p
a. Effect of the interaction between night part (evening/morning) and treatment combination
Success/failure ∼ treatment combination + night part + treatment orientation + 1|night nr	86	565.3
Success/failure ∼ treatment combination × night part + treatment orientation + 1|night nr	81	568.6	5	–6.63	0.25
b. Effect of treatment combination
Success/failure ∼ treatment orientation	45	321.7
Success/failure ∼ treatment combination + treatment orientation	40	324.7	5	–6.98	0.22

AIC, akaike information criterion.