Interviewing by Candlelight

I picked a bad time to start work here. Our office has been a building site for the last two or three weeks and it looks like remaining so for several more. Rather than move out en masse into temporary office space somewhere, we've attempted to move ourselves around within the building, huddled in serried ranks in the back room, grabbing whatever tables we can find or simply working from home.One colleague has set up office in Starbucks.  
Power cuts are frequent. This morning Lena & I were interviewing for a new post and all the lights went off. First time I've ever interviewed someone in the dark (unless you count Philip Glass in the bowels of London's Colisseum). Not ideal. You can't see the candidate's body language. Still, she took it in her stride.