I have 6 of these ( I have the first model thats 119- 1w leds ) over my 210. I can grow anything anywhere in the tank. I have the fixtures about 8" off the water. I started with 4- 400w MH then switched to these cause my electric bill was crazy. If u dont need a dimmable fixture then these are a #1 choice by far. They are a little noisy though cause of the fans. I have the first models so the new ones might b a bit better. I have some pics here of my coral from a sale thread, ill try to dig up if they didnt get wiped out.