I had L. 'Hopi'. The only photos I currently have access to show it leafed out but not in flower. (I'm certain I have one in full flower, but will have to access my old computer for that file.)
However, I have uploaded a borrowed image of Lagerstroemia 'Moonlight Magic'. The result of yesterday's lunch hour trip to Wells. I simply could not exercise any restraint...
$20 of entertainment & a great investment if it thrives: the leaves glow when backlit.
Not the best image - looks muddy. When the sun returns, I'll get a shot of it backlit.