What exact experiences are you rferring to please? Please give us an example that you had happen with some details please.... I think you are comparing apples to oranges... Flowering plants stretch, seedlings don't, unless they don't get enough light. We were discussing seedlings, not plants that you moved from vegetating to flowering
just like u said about raiseing the lights to not cook the seedlings,that is gunna cause the plants to strech... it happend to me when i through in some plants under my 600w mh to early..this is just my opinion from whats happend to me in experience..
That defies all logic..... and scientific reasoning. Plants do not elongate stems to reach a physical light. They stretch if they do not receive enough light for photosynthesis. If the plant is receiving enough light, it's not going to stretch. A 1000 watt HID lamp can be placed 10' over the seedlings, and they are still going to receive enough light to avoid stretching. I've laid out two great reasons NOT to raise seedlings under HID lamps, stretching is not a problem with HID lamps...
I would have to seriously question the brain power of anyone that claims experience otherwise, unless of course it is something extreme and stupid, like a 150W HPS at 8' above the plants....