Upload & Sell: Off
Yeah, it's (relatively) easy to make a large light smaller -- masks, etc. -- but it's harder to make a small light bigger.
Well, you can use diffusion panels and silks to enlarge a light source. ;-) It does make spill harder to control though.
Of course. I said it's harder; I didn't say it was impossible. Sometimes you can move it closer, sometimes you can bounce it, etc.