0-10V is tough...
I assume your running 3W cree's and u have 3 in serial so you get 9V output on them?
Or you have 4 of them in serial that your just running downvolted at 10V?
The thing about dimmers is you need to match the voltage range for the circuit you have.
A Dimmer which can only go down to 9V-24V wont work in your scenario which eliminates a lot of home automation products which are based off MIR25 transformer..
Maybe some might work with a lower range.. from 3V-12V..... look up home automation and u can probably use what they use on the MIR25's .
Ummm im playing with manual pots/rheobuses... 12V tho... not 10V.
Something which u normally see in computer cases and not outside on top of a fish tank. :P
^ if u need some advice on something like that DIY, i can probably help you convert a PC system's electrical to a working LED array.
However that meanwell needs to do 12V for the PC accessories to work.