The invention relates to a sensing lamp and a sensing device. The sensing lamp comprises a lighting source, the sensing device and a driving circuit. The sensing device comprises a photosensitive sensor and a controller. The photosensitive sensor is used for sensing brightness of external environment in real time to obtain a sensing electrical signal; and the controller is used for outputting a first control signal when the signal intensity of the sensing electrical signal reaches a first preset threshold to control the driving circuit to drive the lighting source to light intermittently and periodically. The controller is also used for outputting a second control signal when the signal intensity of the sensing electrical signal continuously reaches a second preset threshold within a preset period to control the driving circuit to close the lighting source or adjust the period of periodical and intermittent lighting of the lighting source, wherein the preset period at least comprises apart of lighting intermittent time period in one lighting period of the lighting source. The sensing lamp and the sensing device can accurately judge the brightness of the nature environment and carry out light-off control or lighting period adjustment according to the brightness of the nature environment.