Nice B52's, they look really healthy and great.
Please tell me you haven't put them in the refrigerator yet?
Unfortunately if you did already, take them out immediately, you have to acclimate your plants step by step, if they were growing in hot conditions and you decided to put them in the fridge i'm afraid they will suffer from shock and might die by the harsh change in temperature.
They even might not go dormant, vft's don't go dormant in a change of temperature from 90F-34F in a day, that will kill them. Instead, they need the right signal to go to sleep,then they go into their deep dormarcy. In order to send them the right signal, take them out of the fridge and put them back in the conditions they were, simply with a combination of factors start reducing the amount of light, watering, and temperature. Once few of the traps have darken, and the plant start making the short winter leaves that's when they can be put in their deep dormarcy.
I think this would be the best way to go, lets hear other comments from the experts.
Good luck, and I can tell these plants have been growing under lights?
One other thing, your location like steve said is very important so that we can help you better to understand your climate, perhaps there's no need to put them in the fridge?