Quote Originally Posted by Skateboardingpunk420
Ive heard that HPS can kill seedlings.. but somehow I got mine up and going under one.. its not the best but it works to sprout.. also, the sudden change in lighting might have caused them to stress.. but I dont know.. ventilation?
Heat?
My plants have 1 month and 3 weeks.
The distance from plants to light its about half 50 cm.
I dont have ventilation non-stop...shall i ?
If i close the closet door's the temperature go up to 40 °C.


What shall i do to dont kill my plants and use this light pls?