The toothbrush having light emitters on a bottom side includes a handle that may be gripped by a user. The handle is positionable proximate the user's mouth. A bristle is coupled to the handle. The bristle engages the user's teeth when the handle is positioned proximate the user's mouth. A processor is coupled to the handle. A light emitter is coupled to the handle. The light emitter is operationally coupled to the processor. The light emitter selectively emits light. The light emitter may communicate the maximum duration of time. An actuator is coupled to the handle. The actuator is operationally coupled top the processor. The actuator selectively actuates the processor.