Downlight apparatus

A downlight apparatus, comprising:

• a light source plate mounted with a first set of LED chips and a second set of LED chips, the color temperature of the first set of LED chips being different from the second set of LED chips;
• a driver box with a top driver box and a bottom driver box for containing a driver plate mounted with a driver circuit for receiving a color temperature setting to adjust a light ratio between the first set of LED chips and the second set of LED chips, the top driver box comprising a thin hole and a sliding groove;
• a switch button with a switch socket, wherein the switch button has a button top with only grooves on a surface of a button plate for a user to operate;
• a switch unit mounted on the driver plate with a lever protruding upwardly inserting into the switch socket, the switch button being disposed on a top side of the top driver box and the switch unit being disposed on a bottom side of the top driver box, the switch button being capable of sliding along the sliding groove limiting by the thin hole,
• wherein a position of the switch button with respect to the sliding groove causes the driver circuit to generate a corresponding driving ratio to the first set of LED chips and the second set of LED chips, wherein the driver circuit comprises a PWM controller for adjusting a first duty ratio of the first LED chips and a second duty ratio of the second LED chips to change a mixed color temperature of the first set of LED chips and the second set of LED chips, wherein summation of the first duty ratio and the second duty ratio is 100%, wherein when the first set of LED chips are turned on, the second set of LED chips are turned off, wherein the driver circuit comprises a wireless circuit, an external command from an external device is sent to the wireless circuit to disable a function of the switch unit, wherein when the switch unit is disabled, a position change of the switch button does not change the corresponding driving ratio of the first set of LED chips and the second set of LED chips.