Abstract: A seat assembly for a pedestrian operable suction sweeping machine comprising a telescopic chassis 1,3, supported on a caster wheel 17 and having a fold away seat arrangement 19 including a seat 20 supported on a seat plate 22. The assembly is provided with a pair of rearwardly facing lights 29,31 and a flashing or hazard warning light 47, the lights being supported on support arms 37 of a light frame 34 and the light 47 on a swing bracket 49 so that when the seat assembly is folded away for pedestrian operation of the machine, the lights can be folded into a stowed position to either side of the seat 20. The lights are preferably powered from a power source on the machine and wiring 53 for the lights is entrained around a dolly 57 to allow extension of the chassis 1,3.