Table 5.

Percent of light reduced over incubator and oxyhood by open weave and closed weave covers under daytime and nighttime conditions.

Source	n	Mean	SD	df	t	P
Incubator
Daytime				20	−6.06	0.00*
Open	10	43.74	8.96
Closed	12	68.62	10.01
Nighttime				20	−6.37	0.00*
Open	10	20.07	17.78
Closed	12	64.51	14.95
Oxyhood
Daytime				20	2.03	0.06
Open	10	92.6	2.05
Closed	12	68.62	10.01
Nighttime				20	−2.29	0.03*
Open	10	71.56	13.38
Closed	12	82.97	10.01

*P < .05.