Lightroom Tip: Adjusting More than 5 Stops of Exposure

Lightroom's exposure adjustment has a range of -5 to +5 stops.  You can exceed that limit by using an adjustment brush.  You can paint the entire screen with a large brush or apply it to any portion of the image as usual.  The effect of the adjustment brush is cumulative and you can apply it more than once.

Note: Of course, this only makes sense if your camera captured detail in the first place.  This won't magically bring back clipped details.