No focused light. We are using next light veg 8 leds. These plants have been in veg now 4 months. They are experimental plants and didnt get moved into bloom. None of these plants have ever shown much of a chemical burn if any at all.
These plants did have what we believe to be springtails at one point but fom what I have read they dont really effect cannabis plants and may actually benefit a garden by consuming decaying matter ( I am still researching that... ). I don't believe we have seen them in about 3 or 4 weeks after making some changes in watering and nutrients.
They did get moved into a location that got colder than they were used to. The room was spray foamed and extremely air tight but didn't have a door installed until last week. It did hold some heat put off by lights, fans, dehu but I would say it got in the low 50s high 40s at one point a few random times. I was thinking this was possibly the cause... But I wanted to see if someone has dealt with this and figured it out.