they go to enernoc, they sign them up. if suddenly there's a hot day and all of the air conditioners in the state go on, the utility or someone in the grid can go to enernoc and say we need x amount of power, they push the button and dispch a charge to all 150 supermarkets, they dim the lights by about 30, 40%, they turn off some of the anti-sweat devices, they back off the air conditioning a little bit, and you have essentially produced power, and you avoided a brownout. it's kind of like a virtual power plant. >> suzanne: and how much could the supermarket potentially save, do you think? >> well, in this particular case, the way this works, this is the a large chain in southern california, just for signing up they get a quarter million dollars a year without having to lower their power. and if they lower their powers because they have to, then they split the saves with enernoc. and there's a huge amount of this reserve power out there, so it really is a little magic trick. >> suzanne: what is the potential for this techn