something like the ALPENA LED Light Strip from Autozone, the part number is 86503,
When I bought my K7 Wee in 2015, it came with a GIVI clone top box and GIVI Monokey panniers. I was also wired with the built-in run/brake lights for the top box, Alpena LED strips on the panniers for run/brake/turn and Alpena LED strips on the mirror for turn signals. this was all in addition to the OEM lights.
There was no problem using the OEM turn signal relay for the additional LED strips.
As to the Alpena LED strips on the panniers, the PO had 3 strips on each pannier; one red for the run light, one red for the brake light and one amber for the turn signal. Altogether it made for a lot of wires running through the panniers ; which were connected to the main wiring via 4-wire trailer type connectors so the panniers and top box could be removed.
The LED strips provided adequate conspicuous lighting set up in this fashion. The thing I found about the Alpena amber LED strips is that the clear coating turned gummy and sticky over time. Dirt, sand, leaves and the bike cover would stick to them and the sticky goo would get on my pants/gear if I brushed up against them. But, they worked fine once I corrected all of the bad connection made by the PO.
The stickiness problem also occured with the new amber strips I put on the mirrors after dropping the bike and breaking one of the mirrors. I don't know why the difference in the nature of the silicone coating between the red and amber Alpena LED strips but I never had that problem with the red ones.
I eventually replaced the GIVI abs boxes with aluminum and decided not put LED strips on any of the aluminum boxes. Instead I mounted a single bracket abopve the license plate and put on one of these LED strips
that includes run, brake and turn signals all in one strip (I'M NOT AFFILIATED WITH THE VENDOR, JUST A SATISFIED CUSTOMER).
It includes much simpler wiring than multiple LED strips and the dual circuit element (allows for the light intensity changes between run light and brake light). The LED chips are densely packed right next to each other instead of separated and strung out over the length of the strip making for a bright light.
This configuration gives me the addition lighting without the need to have the top box or panniers mounted all the time. The top box and panniers do have reflective strips for additional visibility when mounted.
This solution may be too pricey depending on how many Alena LED strips you were thinking about using but after buying/trying a few other cheaper LED strips this is the one that worked best for me.