After a week of this its time to fire up the flowering lamp. I use a 400 watt HPS.
Because my cabinet is only 18 inches deep I needed to make a custom cool tube.
I went on eBay and got a Pyrex tube. They used to sell them to bake with.
They are called bake a round. I guess you made bread out of them. There are several
DIY cool tube instructions on the internet. I will spare you the details. I use a 120 cfm
duct booster fan attached to the back of it behind the cabinet. Works for me.
So on a typical day first the led’s come on for an hour and they get watered for 30 min.
Then the HPS warms up....
Then flower time.
Day 26
The cabinet is vented outside through the light fixture. There is an intake of fresh air at the base of the plants, also additional exhaust next to the lamp and circulating fan hanging on the right. A couple trays of water on the bottom to maintain the correct humidity