Naw, it won't hurt them but they'll stretch more. Use the HPS and at least throw a couple of 6500k CFLs in there too, as that will prevent stretching.
jamstigator Reviewed by jamstigator on . new grow CABINET .....Need help i need some feed back..on my CABINET ....i need to know were to put my fans....and if 4 CFL 18 watt lights will work for one bomb ass cron plant......let me know what you would do to it...if it was yours Rating: 5