I think I read a review where you can open the light and basically cut the wire to the fan.. according to the guy the heatsink on the lights is enough cooling.. idk if it's something you would try or not..I have 7 smatfarms across 3 tanks and I am looking for a replacement on one of them. Here is why. The smatfarm lights work great. I have very consistent coral growth and the lights perform great. Here is where they fail.
Across all of my lights I have two different versions of software and I am not sure of any method to update them. They have no ports that would allow a software upgrade. Even with that said I would want to downgrade all the lights to a previous version of the controller software.
The modern version of the lights has a hard set-point where the cooling fan comes on. It is 25% intensity. If you hit 25% intensity on any channel the fan will turn on. Across all of my lights I have 1 or 2 of them that I find the fan noise to be acceptable. I have rotated lights across tanks to keep the lowest noise fans in the most occupied rooms. For this reason alone, I am shopping for swapping out the Smat's on one of my tanks. The rest would probably be rotated out as needed and I have no plans to purchase any more of them.
The Nicrew looks interesting and I may give it a go.
Kind of makes me wonder if you could maybe replace the fan for a quieter one as a sort of compromise