do you mean sort of a mini greenhouse?

theoretically you could use cfls in a greenhouse like atmosphere to add veg hours in flower season. why not... but i wouldn't screw with an old plant unless you don't care. but i have done something similar a long time ago with flourescents in a sun room... but if you mean physically move the plant from one to another... i wouldn't.

if you are in a controlled area, just run the lights before the sun dims, until desired off time... but i don't think you are talking about that...

EDIT: You should only attempt it if you have deceant, at the least, additional light.

but i did it because i wanted to veg the plant longer, due to a late start, for the plant i wanted... but i started the plant in the sunroom, and added the light before the sun got near 12/12...

i gave them the longest hours early OF COURSE, then backed it off as time went, until i was ready, and then i just had the lights run during daylight hours, to make sure the winter sun had some help... it was a really early grow for me, but considering all... it worked great