A month in - trimming parsley and cilantro

My garden's been growing for a month now and I've enjoyed some small harvests.  I have a question about trimming parsley and cilantro.  Both have reached the lights which I don't want to raise since other plants are still small.  The shoots that have reached the lights are basically a long green shoot with a few leaves at the top.  If I cut it down an inch or two, I'll trim the leaves off.  With  nothing left but the stakl, I assume I've killed that plant?  Am I correct?  What do I do?  Let them hit the lights?  Trim them?   Where should I cut?