Please forgive me. I was responding directly to @GreenThunder, so I didn’t tag him in the response.
Most people seem to prefer the compact growth that you have. Short node spacing leads to more bud sites. That makes me question why you want to make them stretch at this point.
After she begins to flower is when her natural “stretch” will take place. This growth will be made of more flowers/buds instead of stems, which is what you get from stretching during the veg cycle.
You really want your light as close as possible without harming the plant…