Abstract: The invention discloses an self-adaptive LED fluorescent lamp, comprising: a housing comprising a lampshade and a radiator fastened with each other, a Printed Circuit Board (PCB) consisting of one or more LED lamp sets and LED driving control units, and lamp caps sleeved on two sides of the housing; the LED driving control unit comprises a voltage detection module, an intelligent switching module and a linear constant current module; the voltage detection module comprises a first resistor and a second resistor, which are connected between two output ends of the rectifier filter module for voltage division, and a first capacitor connected with the second resistor in parallel; the intelligent switching module is connected with a common end of the first resistor and the second resistor, the output of the intelligent switching module is connected with a plurality of LED lamp sets, and each of the LED lamps is connected with a compensation resistor in series; and the linear constant current module consists of two

Abstract: The invention discloses an self-adaptive LED fluorescent lamp, comprising: a housing comprising a lampshade and a radiator fastened with each other, a Printed Circuit Board (PCB) consisting of one or more LED lamp sets and LED driving control units, and lamp caps sleeved on two sides of the housing; the LED driving control unit comprises a voltage detection module, an intelligent switching module and a linear constant current module; the voltage detection module comprises a first resistor and a second resistor, which are connected between two output ends of the rectifier filter module for voltage division, and a first capacitor connected with the second resistor in parallel; the intelligent switching module is connected with a common end of the first resistor and the second resistor, the output of the intelligent switching module is connected with a plurality of LED lamp sets, and each of the LED lamps is connected with a compensation resistor in series; and the linear constant current module consists of two

Abstract: A flash light includes a housing having a front end and a rear end to define a fixed length from the front to rear end. The housing further has a light cavity and a power cavity for receiving power source. The light arrangement includes a lens disposed at the front end of the housing, a light source disposed within the light cavity, and a light adjustor movably coupling with the housing to selectively adjust a distance between the lens and the light source along a longitudinal axis direction of the housing for adjusting the illumination angles of the light beam without altering the fixed length of the housing. The flash light is adapted for selectively adjusting illumination angles to provide variety of light patterns.