Average distance between light and plant tops, and lumen thing

Average distance between light and plant tops *Fluorescent-T5HO- any wattage - 3cm to 10cm /*HPS 400w - 30cm to 40cm /*HPS 600w - 50cm to 60cm /*HPS 1000w - 70cm to 80cm

Nice post in reference to the HPS light question.

Graphically shows the exponential reduction of light by a rough factor of 4 per foot.

Nicely done! Welcome!

thank you, i think that Graphic is really helpfull