I have the same problem. Myself and yourself have put them in, wanting to get them a 2 week head start. Yes we both forgot they stretch within them first 2 weeks. It needs to be closer to the light OR do as I have done, put that pot on the windowsill take it out the tent, also if you have a metal U shaped item bend the stem down till you can put the light closer. Bend the stem now as when it gets back under the light it will stretch towards the light. It can be a 'happy' mistake as well as it is just Low Stress training and you can find the stem grows other colas on it, that are like high colas in themselves.