I am currently growing three plants under 1000 watt hps but this new idea is a work in progress for this summer.
New grow room:
Lights: 12 one thousand hids air cooled
co2: C.A.P GEN-2NG
Enviromental control: the sentinel chh4
exhaust fan: two 1050cfm
AC unit: two portable 12000 btu ac's...
