Qualitatively it appears very high and promises a long life.
I use the lamp for two plants which would go down in my rather dark room on the 1st floor of a side street well otherwise in not too long ago. Because I do not want to miss out on the green in my room I do not begrudge my plants every day time with this lamp and thrive.
Conclusion: The lamp served its purpose fully, makes an impression of quality and brings me to the consideration to appoint another lamp for the dark corners of my apartment to keep there plants that I do not have to provide every two days to the window so that Do not enter! ;)