it was estimated that the recruitment of the planned number of patients could not be completed within further 5 years.

The aim of this trial is to show that the low irradiance level is not worse than the high irradiance level in the phototherapy for neonatal jaundice.

Neonatal jaundice is a commonly disease. Phototherapy is performed to prevent from kernicterus.However, light sources and irradiance level are different among hospitals, and it was controversial whether the improvement of jaundice is related to the irradiance level of phototherapy or not. In addition, long-term side effects are not clear, therefore, excessive irradiation should be avoided. The purpose of this study is to show that the low irradiance level is not worse than the high irradiance level in the phototherapy for neonatal jaundice. This study is multicenter randomized controlled trial conducted by Nagoya University Hospital, Anjo Kosei Hospital, Kasugai Municipal Hospital, Handa Hospital, TOYOTA Memorial Hospital, National Hospital Organization Nagoya Medical Center, Japan Red Cross Nagoya Daiichi Hospital, Hekinan Municipal Hospital, and Ogaki Municipal Hospital.

Inclusion Criteria:

• Asian full-term neonates with jaundice between 48 and 96 hours of age.

Exclusion Criteria:

• Patients with low-birth-weight, early onset jaundice before 48 hours of age, perinatal asphyxia, antimicrobial therapy or respiratory disorders. Patients with jaundice caused by hemolysis, or functional or anatomic obstruction. Patients who need treatments except for phototherapy.