no noise and no flicker-compact and easy set up with low operating temperature perfect for digital camera photography socket. Fit most standard photo fixtures provide a bright environment for taking product photos long life energy saving. Specification: socket: e27 frequency: 50hzoutput: 135w pure white day lightweight (approx): 158g (with the package)/each note: always hold the plastic part, not the glass part frequent turn on/off will reduce working life significantly.