That is not my experience.
These last 2 pairs were a good example. And this is my consistent experience. So, I am sure dropping the light creates More Stretch.
The 2 in front had the light down since they were shortish about 26 inches and didn't stretch much so I brought the light down to them
The ones just placed in the back, were under the LOWERED light. They bombed up into the light hood and I've raised it 2 times to keep from burning them.
Lots of myth and lore, we have to do our own experiments to know what is real about it.