Go to Wal-Mart or one of your local auto parts stores. They will have some led strips with a battery attached to them so you can check the brightness.
I bought the 12 inch strips and wired them to the back of my Weestrom under the rear rack. Ran them like that for 8-9 months. I bought a Givi 46 and took the same lights off the back of the bike and mounted them inside the reflectors. I just wired them as running lights as I also have a set of Skenes on the rear that do running light/brake light duty.
These light strips come in various lengths--which you can cut to fit--and various colors if you choose. And the ones I bought come with 3M tape already applied.
I haven't had any trouble out of them since I installed them.
I like them so much I just put a set on the Connie.
If I remember correctly the 2 12" strips cost about $ 20.