Night: 24 ÷ (1+5/8) = 24× 8/13 =192/13 hours;

Daytime: 24-192/13 =120/13 hours;

There are fewer days than nights.

192/13-120/13 = 72/13 hours;

Method two,

The day is 5/8 of the night; That is, there are 8 copies at night and 5 copies during the day; There are 5+8= 13 copies throughout the day;

Less time during the day than at night accounts for (8-5) ÷13 = 3/13 of the whole day;

Namely: 24×3/ 13=72/ 13 hours.