On Sat, 26 Nov 2016 17:43:34 +0000, ARW wrote:

However the person closest to the answer (when we have finished the job)
will win a prize[1].

If it helps at all I can tell you that the basement extension has 54
down lights.

[1] Probably a **** one

I'm feeling lucky 'cos the only prizes I've ever won in my entire life
have been **** ones. I'll say 64.