Last week I decided to some home grow at my attic. Picked up a 600W HPS, carbon filer, relay box, fans and some other stuff. I had my concerns about the heat this 600W HPS would produce but I decided to set it up. Unfortunately the temperature was rising and stopped at 36 C/ 97 F. I could not get it down especially because it is summer and the outside temperature was 25 C/77 F. The only thing I could think of to take 4 Cool White FL of 63W each and hook them up. Four warm white FL will be used for flowering. The HPS will be used in the winter (Grow journal number 2?).
The equipment is installed. The carbon filter will be installed later because I will need the fan to get as much warm air out of the attic as possible. I used reflected radiator foil to keep the light as much as possible on the plants.
20KG of organic soil in the pots, 0.5 litres water each and let it set 24 hours. Now it was time to turn on the lights and get my four PP clones into the soil. They will be on 18/6 for about 10 to 14 days if everything goes well.
The first week I will give approximately 0.2 litres a day without any fertilizer. After a week I will start with a biological fertilizer (7-30-20, low concentration).
Hopefully I have time to update this journal once a week. Any comments, questions or ... are welcome.