Okay.. so yesterday.. I downloaded that fantastic freebie light set(and the photog props) and slipped one into a simple scene.  Model, clothes, hair, light(and another mesh light for fill)loveseat.  All stuffed into a cube.  With the light prop(the brass floor lamp)my render is the noisiest render I've ever had.  On the lux light tab, I turn that light off and my render is beautifully clear and noise-free.  What gives?

Took screenies of both views

Noisy one

Clear(er) one

And a zoomed out one so that you can see the light setup.  It's pretty easy to tell where the extra mesh light is.

I WANT that floor lamp in the scene so I'm gonna let this one back until either my hot noise is gone or I figure out that it's just not going to go away.  This pretty much hasn't cleared up since yesterday morning.