This will be my first time using this HID lamp. I got it from HTG via eBay and it was pretty inexpensive ($119). If this grow goes well I will probably invest in a digital ballast, efficiency being the biggest draw. I've heard or read somewhere that cheap HID ballasts can perform as poorly as 50% efficient...which means your 400w lamp is actually drawing significantly more from the wall.

Hope you have fun with your new toys. You'll be including this hut in the thread you started for the Durban, right?
doco Reviewed by doco on . Hydrohut Ventilation Just got a Hydrohut Mini (39" x 39" x 6.5') and wanted some feedback about ventilation from you guys. I have a 400w HID with a cooltube, a 6" Vortex 465cfm fan and a 265cfm Dayton squirrel cage fan. My latest plan (they change a lot it seems) is to vent the cooltube from outside the hut, pulled by the 6" Vortex, and exhausted out a window through a flange in the back of the hut - that way the 400w light is completely sealed off from inside the hut. Then the smaller Dayton pulls air from the Rating: 5