Another option, Kessil's are nice i am sure they would do the job though. However they must use an internal fan to cool their leds.
Orphek PR72 planted (similar design), is also powerful and 100% passively cooled (no fans). And 1 year warranty like Kessil.
Orphek PR72 planted (similar design), is also powerful and 100% passively cooled (no fans). And 1 year warranty like Kessil.