Abstract: A step device includes: a mounting seat including a limiting part and configured to be mounted to a vehicle body; a step seat including an engaging part; a step mounted on the step seat; and an extension and retraction assembly connected to the mounting seat and the step seat, the extension and retraction assembly being configured to drive the step seat to move between an extended position where the engaging part is separated from the limiting part and a retracted position where the engaging part is engaged with the limiting part.

Abstract: A lighting device (100) for creating a living environment atmosphere, including an LED lighting source (102), a transparent housing (110) and an atmosphere optical film (112). The light-emitting angle of the LED lighting source is greater than or equal to 45 degrees, and the transparent housing is configured to clad the LED lighting source and has an atmosphere light filtering portion (104) and a lighting transparent bottom (106). The atmosphere optical film is located on a surface of the atmosphere light filtering portion and has a plurality of high refractive index layers (112b/112d/112f/112h/112j/112l/112n) and a plurality of low refractive index layers (112a/112c/112e/112g/112i/112k/112m/112o) arranged in a staggered manner.