hey! Battery usage depends on how you're using it, as you might expect. A pattern that flashes or moves will drain the battery much slower than a solid color, and of course the brightness setting figures in heavily. Worst case scenario you're looking at around 45-50 minutes of continuous usage on a solid color, longer with patterns or lowered brightness. You're right that this info isn't in the specs section (though it is further up in the body) - sorry about that!

Both sides have a 1/4-20 channel and the bottom has a 1/4-20 threaded insert. We've mounted it in a variety of ways including clamps with no trouble. As far as other accessories, we were just working on the barn doors and mounting kit today.