A projector throws a line, a boundary or a warning symbol onto the floor. Painted tape wears through where the forklifts cross it and has to be redone; projected marking does not wear, and moving a walkway means moving a bracket.
Paint and tape wear under forklift traffic and have to be relaid, which closes the aisle; a projected line stays crisp and moves with the layout — you reposition the unit instead of repainting.
Yes, for a line or boundary marking under normal industrial lighting — direct sunlight washes any projection out, so outdoor positions need shading or a different approach.
Overhead, aimed down at the area you want marked — height sets the width of the line, so tell us your ceiling height and the marking you need and we'll match the model.
They are the same machine — a gobo projector throws whatever is cut into its stencil, so a safety gobo marks a zone and a forklift safety light is that unit with a hazard stencil in place of your brand mark.
Go by wattage and rating, not by the listing name — pick IP65 for a working floor and size the output, from a 500 mW module up to a 20 W marker light, to the throw distance.
A projector instead of tape: virtual floor marking throws a line, an arrow or a safety zone onto the floor, so the marking never wears off and changes with the layout.