Legal Question in Real Estate Law in Missouri

These cases always come down to the particular facts. If the floors are old and ugly, the lessor may not have to replace them. If they are unsafe or likley to incur further damage if not reparied or repalced now, they might have to under the lease prevision you described. The same is true as to light fixtures. If the light is not functionining (not due to the actions of the tenant or their guests) than the lessor may ahve to repair or repalce it. If, however, the fixutre is just old and outdated (from a design standpoint) it is unlikey that a court will make a lessor replace it. You might consult directly with a civil attorney in your area. Many offer a free or low cost initial consultation. Take your lease and any pictures or other evidence you have, and go see one. You may only have to pay them to write a letter or two.

Good luck