Have the lamp for 2 months in use. My Indoor Chilli breeding in closet (lack of space) is very happy about the light spectrum of this lamp. The room is completely dark and it is used as a single light source. As I said, used the seeds 2 months ago and the first plants (Golden Cayenne and Serano) already carry some flower initials. And all with a lamp and closet. I am really extremely satisfied. A visit is always surprised wenns from the storeroom purple lights. Buy rating given absolutely.