I have a viperspectra 300w is this too close?? They are about 6 inchs away Sent from my ASUS_Z00A using Tapatalk
I kept mine 8" away during flowering but each plant is different. Heat stress = raise it. First to third grow. From beginner to novice lol.
Rule of thumb is, Put the top of your hand about 5 inches under the light and leave it there 15 seconds if your hand feels a little uncomfortable it's going to feel uncomfortable for your plants. Put an fan or better yet put an oscillating fan between your plant and light to keep the canopy cool. What's your temps? But I get a mars 600 7-8 inches from tops of plants. Looks Good! Nice Job Sent from my iPhone using Grasscity Forum