A lighting apparatus, comprising: a driver configured for converting an indoor power source to a driving current; a first branch, comprising multiple first LED modules, the multiple first LED modules being divided into multiple first segments (8812, 8815), adjacent first segments (8812, 8815) being connected with multiple first nodes; a second branch, comprising multiple second LED modules, the multiple second LED modules being divided into multiple second segments (8819, 8820), adjacent second segments being connected with multiple second nodes; a first switch selectively configured for connecting the driving current into the first branch; a second switch selectively configured for connecting the driving current into the second branch; multiple middle switches (8803, 8804, 8805, 8806) configured for selectively connecting the first nodes and second nodes; a switch control unit, configured for controlling selections of the first switch, the second switch and the multiple middle switches (8803, 8804, 8805, 8806) for determining a conductive path of a selected set of LED modules selected from the multiple first segments (8812, 8815) and the multiple second segments (8819, 8820) for mixing a required optical parameter; the lighting apparatus being characterized in that the switch control unit is configured with a manual switch operated by a user, and the manual switch is configured to provide multiple options, each option corresponding to one conductive path of corresponding selected set of LED modules selected from the multiple first segments (8812, 8815) and the multiple second segments (8819, 8820) for mixing a required optical parameter. a driver configured for converting an indoor power source to a driving current; a first branch, comprising multiple first LED modules, the multiple first LED modules being divided into multiple first segments (8812, 8815), adjacent first segments (8812, 8815) being connected with multiple first nodes; a second branch, comprising multiple second LED modules, the multiple second LED modules being divided into multiple second segments (8819, 8820), adjacent second segments being connected with multiple second nodes; a first switch selectively configured for connecting the driving current into the first branch; a second switch selectively configured for connecting the driving current into the second branch; multiple middle switches (8803, 8804, 8805, 8806) configured for selectively connecting the first nodes and second nodes; a switch control unit, configured for controlling selections of the first switch, the second switch and the multiple middle switches (8803, 8804, 8805, 8806) for determining a conductive path of a selected set of LED modules selected from the multiple first segments (8812, 8815) and the multiple second segments (8819, 8820) for mixing a required optical parameter; the lighting apparatus being characterized in that the switch control unit is configured with a manual switch operated by a user, and the manual switch is configured to provide multiple options, each option corresponding to one conductive path of corresponding selected set of LED modules selected from the multiple first segments (8812, 8815) and the multiple second segments (8819, 8820) for mixing a required optical parameter.