The invention discloses a lower voltage test light having a digital function and a neon tube function, which is intended for implementing testing in daytime and at night and guarantees testing precision. The test light herein includes a digital test light, a neon tube test light, a first cap, a second cap, a first fixing block and a second fixing block. A tail part of the digital test light is fixed inside the first fixing block. A tail part of the neon tube test light is fixed inside the second fixing block. The first fixing block and the second fixing block are installed rotatably with respect to each other. A front end of the digital test light is provided with a first cap. A front end of the neon test light is provided with the second cap. The inner cavity of the first cap is provided with a lamp body which is provided with an illuminating lamp thereon. An outer wall of the second cap is provided with an insert piece. The second fixing block is provided thereon with a groove for cooperation with the insert piece. The test light can be used in daytime and at night and can guarantee testing precision.