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universal programmable multi-channel USB LED controller.

Hello 

I look for a universal compact programmable multi-channel USB-interface LED controller. This is for live cell imaging application in microscopy. In other words, it should let us change the brightness of the LED and turn on/off for some periods. 

We will have multiple LEDs.  We will use up to 8 Thorlabs LEDs such as this:

http://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=6071

M470D2Blue (470 nm) LED on Metal-Core PCB, 1000 mA, 650 mW (Min) is one the case

specs: http://www.thorlabs.com/thorcat/MTN/M470D2-SpecSheet.pdf 

From this data sheet, it looks like the output has to be exactly 3.2V with adjustable current...650mA - 1000mA. 

Do you know any off the shelf product that meets this criteria?