each other in parallel as illustrated in fig3 accordingly only two electrodes 125 see fig4 of each health care lighting package 120 are exposed to the outside by electrically connecting only two electrodes of each lighting package 120 to neighboring leds a process of configuring electrodes can be simplified compared to a serial connection method in addition to the rgb leds the general lighting packages can further include one or more leds for radiating visible light of a specific incoherent wavelength in the wavelength range of 610 u00b1 20 nm 610 u00b1 5 nm or 710 u00b1 30 nm 710 u00b1 5 nm according to another embodiment the backlight unit according to the present invention can be implemented by installing one or more leds for radiating visible light of a specific incoherent wavelength in the wavelength range of 610 u00b1 20 nm 610 u00b1 5 nm or 710 u00b1 30 nm 710 u00b1 5 nm in general lighting packages which are rgb leds without installing separate health care lighting packages that is it is possible to install one or more leds for radiating light having a wavelength which is beneficial to the human body in general lighting packages which have been conventionally used in a backlight without having to install separate health care lighting packages according to another embodiment in the above mentioned lgp types the lighting packages are inserted respectively into holes.