When the sales office is separate from the sales models, and the sales office hours extend past darkness, the homebuilder should consider exterior lighting leading from the sales office to the models.
In one particular case, the sales office stayed open until 6 PM. With daylight savings in October, darkness began at 5 PM.
Enough exterior lighting had not been provided for homebuyers to walk safely from the office to the models. A few lights were finally added between the sales office and the sales models, using extension cords.