Conclusion/Discussion
Many phototherapy devices are available commercially and are in use in the UK today. Phototherapy devices are generally robust and have few parts to go wrong. For this reason many currently in use are old technology, but as long as the light bulbs or tubes are still available they continue to be used. Newer devices may not necessarily be more effective than older ones but all should meet the minimum criteria for effectiveness. Of all the devices tested and seen, only the Vickers 80 fails to provide sufficient irradiance.