What obligation does a landlord have to provide outside motion lighting for safety of residents? [View all]

We live in one of two little apartments in the lower level of a great big 100 year old home.

It is very dark at night outside, with a park on one side of the property and a river on one side. The home is set into the hillside of a modest hill. To get from the street to the apartment, one must walk down a woodsy path to the back side of the house.

It can be risky in the dark. There are motion lights attached to the side of the building, but they are not maintained because the landlady can't sleep if they come on.

I have asked more than once for the lights to be maintained, to provide safe space for myself and a member of the familly who is disabled and who fell tonight coming down the steps from the street in the dark. She fell tonight, bruises and swelling on knee, hand, elbow.

Is there a lawful obligation for landlord to provide outside motion lights?

I'm grateful for any information about this.