Thank you all who have commented on my topics that I have started before this.. It has helped me greatly. My previous experience is a pc grow with CFL 1 plant (Easy-ryder) Now a year later, I have finally got my grow room almost where I want it to be. I am currently growing 3 plants 2x Easyryder (29/1/14) (30/1/14/) 1x Random Freebie "Feminized #1" (31/1/14) I germinated the seeds at the same time however they all sprouted on different days! I will be using a 600w HPS - Old magnetic ballast Bio-Bizz Nutes Compost Pictures: Easy ryder 29/1/14 Easy ryder 30/1/14 shorty.. I have a, slow extractor fan+carbon filter ,attached to the cool tube is a 5" in-line 180cfm. I have bought some ducting, which will be attached and extracted straight to the outside through an air vent. In about 3-4 days, then I will remove the CFL's. In a few weeks I'll buy another carbon filter before she starts smelling and attach that to the cool tube. Hopefully wont gain too much temps One question without getting into too much detail: If for 3/4 days I turn my hps bulb on for 30mins then have it off for 1 hour, at a 24/7 time schedule will it damage the bulb? ______________________________________________________ Will update maybe everyday, or every 2/3 days, with pictures!