I tested for tomato seedlings. Seedlings do not spin, by not pushing against it either, for several weeks they were in "pause" (on 19h / day). After 6 weeks I realized that this lamp is absolutely not powerful enough. I then tested on a green plant that lacked light. She seems to have enjoyed the first week (new sheet) and then rebelotte there is nothing going on for several more weeks. I do not understand exactly what's going on with this but I did not really conclusive tests 2. I do not suggest you this product and any copies thereof seen everywhere on the net, for plants it takes more power. There are much more powerful LED bcp but also more expensive .... On top of that the product was delivered with too big nut to the screws. Everything feels cheap Chinese product and not used much.
