When the lights go out

Nothing like a power cut - I've just spent the entire day being told "the lights aren't on" by more observant members of The Horde. Interestingly, quite a few people also asked "are you open?", a courtesy they never extend when they amble in at 8.30 when we're bringing stock in and blearily fail to notice the absence of lights, functioning tills and terrible Ronan Keating songs. Unfortunately, in this case we were open, forced to find books by torchlight in the darker corners and warn customers not to hold their lighters too close to the books, please.