i wouldnt worry about streching personaly. but id throw another 24 watt or 2 in there and take off the humidor that made my last 4 stretch bad and the leaves got all fucked up from the the heat or sumthing.. heres a few pics 1 week old with few humidor and 1 without humidor same strains.
the ones with the humidor were stunned alittle and u can see how much they streched by looking at the base of the stem to the starter leaves.
and the starter leaves got all deformed... id take it off but thats just me.
but the two that where in the humidor are also soil and the one thats raging is dro so i dont know if it took off cause of hydro reasons vs soil or what
and yes i burnt the dro with that light there.. lol... sux