  A prototype of a low-cost phototherapy light system (LPLS) was deployed by
the Ateneo Innovation Center (AIC) at a public hospital in Metro Manila,
Philippines. It underwent clinical investigation for two years under the
supervision of licensed physicians in a public tertiary hospital. This paper
presents the process of upgrading the LPLS in order to enhance capabilities and
improve efficiency yet remain affordable. The following features were added:
(1) a visual and auditory monitoring system in order to remotely oversee the
infant from the nurse station; (2) an automation system that stores data about
the device's light intensity and bulb temperature and records ambient humidity;
(3) an alarm system that activates the warning lights if sensor readings are in
critical level and if the bulbs need to be replaced; and (4) a time setting to
manually set the time of operation and automatically turn-off the device as
programmed. The upgrades increased the system's cost but it remained cheaper
than the ones commercially available. For deployment in remote or off-grid
hospitals, the system was equipped with a solar-powering provision.
