Lighthouses

[Colin Burt]

Ok so when I took the Chartwork and pilotage exam with Transport Canada awhile back one of the questions was, what is the characteristics of the light that comes on as a back up if a lighthouse fails? It is the only question that I know I got wrong that I can not find the answer to. I know I saw it somewhere but can not for the life of me remember. It does not really matter very much but I am curious, anybody know?

[Colin Burt]

I took the next chartwork exam and the same question was on it. The choices were 6 flash's every 15 seconds, 2+1 flash's every 6 seconds, 2 flash's every 5 seconds, and quick flashing. Anybody know which it is? I know it is not the first or the forth as those would be cardinal buoys.