A lighting device includes a plurality of first lighting units emitting a first output light and a plurality of second lighting units emitting a second output light. Each of the first lighting units includes a first light source, a first reflective layer, and a first light converting structure. Each of the second lighting units includes a second light source, a second reflective layer, and a second light converting structure. The first output light has a fist sub peak between 400 nm and 500 nm and a first main peak between 590 nm and 780 nm, the second output light has a second sub peak between 400 nm and 500 nm and a second main peak between 520 nm and 589 nm, and a normal intensity of the first sub peak is less than a normal intensity of the second sub peak.