Abstract: A light source device, including a first light source, providing a first light beam in a first time period of a first period; and a second light source, providing a second light beam in a second time period of the first period, is provided. The first light beam and the second light beam have the same color temperature. The first light beam and the second light beam are emitted alternately in the first period, and a color rendering index of mixed light of the first light beam and the second light beam is greater than or equal to 85.

Abstract: A full-voltage dental water jet of the invention includes a base, a pump, a suspension stand, a reservoir and a microcomputer control system. The base has a lower case and an upper case. The pump disposed in the lower case has an inlet and an outlet. The suspension stand having at least three engaging portions, a heat dissipating aluminum plate, a first standing portion and a second standing portion is disposed between the pump and the lower case. The reservoir is disposed above the base. The microcomputer control system is disposed in the upper case. The microcomputer control system has the function of adapting the dental water jet to the universal input voltage. In addition, the suspension stand made of the silica gel material reduces the operation noise and the vibration of the pump.