A light-emitting device, comprising: - a first lighting sub-module having at least one first micro-lighting unit , each of the first micro-lighting units comprising a first pair of LEDs reversely connected in parallel; - a second lighting sub-module having at least one second micro-lighting unit , each of the second micro-lighting units comprising a second pair of LEDs reversely connected in parallel; - a selection unit electrically connected to the first lighting sub-module and the second lighting sub-module , wherein: - a first voltage feed point of the selection unit is electrically connected to a first terminal of the first lighting sub-module ; - a second voltage feed point of the selection unit is electrically connected to a second terminal of the first lighting sub-module and a first terminal of the second lighting sub-module ; - a third voltage feed point of the selection unit is electrically connected to a second terminal of the second lighting sub-module ; characterized in that: the selection unit is configured to select at least two of the first voltage feed point , the second voltage feed point , and the third voltage feed point in dependence on a voltage type or a voltage magnitude provided from a power source ; wherein when the first voltage feed point and the third voltage feed point are selected by the selection unit , one loop is formed by the first voltage feed point , the first lighting sub-module the second lighting sub-module and the third voltage feed point ; or wherein when the first voltage feed point , the second voltage feed point and the third voltage feed point are selected by the selection unit , a first loop is formed by the first voltage feed point , the first lighting sub-module and the second voltage feed point , and a second loop is formed by the second voltage feed point , the second lighting sub-module and the third voltage feed point . - a first lighting sub-module having at least one first micro-lighting unit , each of the first micro-lighting units comprising a first pair of LEDs reversely connected in parallel; - a second lighting sub-module having at least one second micro-lighting unit , each of the second micro-lighting units comprising a second pair of LEDs reversely connected in parallel; - a selection unit electrically connected to the first lighting sub-module and the second lighting sub-module , wherein: - a first voltage feed point of the selection unit is electrically connected to a first terminal of the first lighting sub-module ; - a second voltage feed point of the selection unit is electrically connected to a second terminal of the first lighting sub-module and a first terminal of the second lighting sub-module ; - a third voltage feed point of the selection unit is electrically connected to a second terminal of the second lighting sub-module ; the selection unit is configured to select at least two of the first voltage feed point , the second voltage feed point , and the third voltage feed point in dependence on a voltage type or a voltage magnitude provided from a power source ; wherein when the first voltage feed point and the third voltage feed point are selected by the selection unit , one loop is formed by the first voltage feed point , the first lighting sub-module the second lighting sub-module and the third voltage feed point ; or wherein when the first voltage feed point , the second voltage feed point and the third voltage feed point are selected by the selection unit , a first loop is formed by the first voltage feed point , the first lighting sub-module and the second voltage feed point , and a second loop is formed by the second voltage feed point , the second lighting sub-module and the third voltage feed point . <EOS>