Array of led illumination modules optimized for initial plant growth stage and illumination device including the same for plant factory

An array of LED illumination modules for a plant factory to emit light spectrum optimized for an initial growth stage of a plant, the array comprising:

• at least one first blue LED chip 10 to emit blue light;
• at least one second blue LED chip 20 to emit blue light;
• a first combination of RGY phosphors 30 applied on a light emission face of the first blue LED chip to form a first RGY phosphors-applied blue LED chip 10 and 30;
• a second combination of RGY phosphors 40 applied on a light emission face of the second blue LED chip to form a second RGY phosphors-applied blue LED chip 20 and 40,
• wherein the first combination of RGY phosphors 30 is configured by combining red, green, and yellow phosphors that first light emission from the first RGY phosphors-applied blue LED chip 10 and 30 has a spectrum having a relatively higher intensity in a wavelength range corresponding to a red color;
• wherein the second combination of RGY phosphors 40 is configured by combining red, green, and yellow phosphors that second light emission from the second RGY phosphors-applied blue LED chip 20 and 40 has a spectrum having a relatively shaper change of an intensity thereof in a wavelength range corresponding to a blue color,
• wherein the first and second light emissions together form combined light emission, wherein the combined light emission has a first intensity peak in a range of 560 nm to 660 nm, and a second intensity peak in range of 430 nm to 460 nm, and a minimum intensity level in a range of 465 nm to 490 nm, wherein the minimum intensity level is higher than a maximum intensity in a range of wavelengths above 700 nm.