Yeah I hope they are. I just topped them yesterday, day 15. Wasn't sure if I wanted to but decided to just do it. Yeah loving the light. No louder than my smaller Mars 300 and really covers a nice area. A little hotter though, I had to start running my inline fan. I'm starting to think I used too much OC+ my run off is like 1800 ppm and ph just over 5. No nute burn but I'm afraid it might be slowing growth. If I use it next time I will use half as much.