Yes, you can. But not by hours of light per day, but by days straight of 24 hour light. If you want your plants to be shorter, you veg them a shorter amount of time.
If you know that you only have a certain feet of height to work with, you 24 hour veg your plants to a height that is 1/3rd of the maximum height your plant can grow in the space, top it to create multiple colas and add weight to compensate for the lack of growth. When it has grown back what you topped, kick back to 12/12.
I'm a bit ripped right now, so I hope that makes sense.