Yeast Lagtime....

[papijohn]

Hi guys, Someone has probably covered this before but I cant find it so bear with me.. I am a new distiller and have just done my first wash... I have 5 gallons of water with 16 ilbs of normal table sugar and 2 ibs of corn sugar, added 1 litre of concentrated grape and mixed it all together... after it got to proper temp I used turbo yeast 24hr and sealed it up... after 2 hours it had a nice foam, then overnight my temp dropped ( Canada ) and it looked like the yeast went dormanent, I then brought it up to temp but the yeast didnt wake up, so I added more yeast and sealed it up again.... It started with another nice foam and then seemed to stop.. after the first time it stopped i made sure to put the heated rope on the bucket so temperature is not a problem now..... So question is how long is the lagtime before yeast starts to show signs again...