I think they're cheap knock off of the cactus. look similar. Some china copy called 'iSHOOT'. Wow, let's stick an I in front of everything and make it cool!!!!!!!!!!!!!! call me iMatt from now on.
Build quality is quite bad. I'd hate to drop them more than a few times. They'll work til the house is finished and I can get some decent ones, who knows, maybe they're sturdier than they look.
p.s. I love strobes
Nice shot there Nick! the only thing you'd clone out would be the chairs, and you've got some grass next to them. Put the car on a different layer (I'm assuming it already is) if you don't like the clone you can cut that strip of grass, and paste a few of it over the chairs, maybe tranform the one that youd' need to join the 3 or 4 to help it look natural, and over lap them, and rub out the edges of one part to about 1/3rd opacity. Or you could just try cloning, almost the same thing and easier.