a modular , mobile sign assembly which has the appearance of a permanent installation including a base module formed of a frame with a set of height - adjustable support posts and a pair of wheels on an axle for movement of the unit between locations , and a display module mounted on the base module providing a lighted sign with display panels having a battery of fluorescent lighting tubes within the sign and a message formed of letters or tiles through which the light projects , and an electrical source , either self - contained by the use of batteries or solar panels or by connection to a remote electrical source . the base module is provided with an appearance of permanence by the use of fascia support panels which are mounted to depend from the upper edge of the base frame to adjacent the ground and removable horizontal panel sections which cover the upper surface of the base module and form seating thereon .