I usually just let it pile up in the back of my light truck.
:Groan:
I have a large pool of light where it collects. Whenever the pool gets full, I sell it. The local microbrewer uses it to make light beer. I used to think I was the only one, but I've since learned that there's an entire light industry that's sprung up around a host of light products. One year, the light I collected was so strong I scored a supply contract from the DOD; they used it to make light armor. Don't think that'll happen this year, though; too many cloudy days has left the light a bit on the weak side. I'm not down about it, though. I'm working on a way to put it into men's loafers for sale in San Francisco.
: )