Sun light as a means of phototherapy in neonatal jaundice is in initial stages of development that is what I draw from my recent searches on the net.I was very much interested in the news the day I heard about it. It has been traditionally used in neonatal jaundice here and in many parts of India.In Ladakh we depend a lot on the sun. We have sun warmed room,solar lightening system, solar water heater, solar water pumps etc.So a phototherapy unit working with the help of sunlight will suit places like our a lot offcourse that will mean taking extra precaution for avoiding sunburns and hypothermia.I attach a link which is regarding the successful use of sunlight for phototherepy.http://cat.inist.fr/?aModele=afficheN&cpsidt=14118771.