BTW I have come to the conclusion that even at 15-18 inches the Large plants are fine without extra CO2 -- probably should have a fan though -- with the Diablos? Your Thoughts on Distance I grow one large plant per Scorpion and have figured out maybe 18-24 inches is a good distance from canopy?
Distance with most LEDs and especially the Scorpion Diablo is a non-issue. Meaning the lights run so cool that you really don't have to worry about burning your leaves from heat. Notice I said from heat. That is key because you can still shock your plants from the light intensity being too high but from just pure temperature the LEDs are great! It allows you to run them closer to the canopy and just lower the intensity dimmer this way you can save on electricity!
As for the UV bulbs, yes I am running them all the way through flower from beginning to end. Some people on the forum board said to start with 1-2 hours a day and then work it up to 4 hours a day at the end of flower. I can see this being beneficial to help save electricity or to harden off smaller plants from the intense UV bulbs. However I veg all of my plants outside in the scorching SoCal sunshine and then flip them by moving them back inside. This being said my plants are big and robust and can handle full sun already at the very begging of the flower cycle. I keep the bulbs on a constant 4 hours a day and let it blast all the way through until finish. I prefer the real UV Reptile bulbs over the add on
HLG UV lights cuz the ones Im talking about have real burning filaments. They get hot as fuck but thats the point! You can't fake it the plants need that REAL spectrum that comes from the glowing light source. Any add on UV LED bulbs will still work better than nothing but its always gonna be trying to imitate a Non-LED bulb. Just give them the real thing!
