Saw white cane
$1p saw many cheap ones on ebay and Amazon,
$1If they have blink or strobe effect they will cause seizure on nearby people not only epileptic and is especially dangerous at night for drivers and bikers. The linked one is especially triggering because it's has full length light up pattern. It would be safer to use light tip on static mode or cane with light up part, the risk of causing seizure will still be there but much less but she will be still visible.
At night i wear reflective armband on my ankles because it's the fastest way person is reached with car/bike lights even 10 meters extra it's huge advantage over vests and accessories over waist level. Any light blinking/strobe is actually less secure because when it goes on/off driver isn't sure where light is right now, at what speed it's exactly moving and what direction it's very distracting and misleading. My father was policeman and is car driver he gates bikers with those lights. Those are generally banned in Europe and there's cash fines because these are causing many accidents but are cheap on ebay.