I'm using them on many installations and they work very well. They're also very reliable and small. Unfortunately, last time I wanted to buy some, I've had a hard time contacting Mediamat. They didn't answer to my emails and I started to try to find something else. I finally bought Elation CyberPack instead and I really like them as well. They can also be controlled with DMX and they're cheaper than Lightmaster. Only thing is that they're a little bigger.
No, your MIDI interface won't work with DMX. Like I said, I'd rather use DMX because you can use up to 512 channels (I said 256 but I was wrong, anyway, it's probably more than you'll need) instead of 16 and the resolution is better (256 steps instead of 128) Also, I've got the feeling DMX is faster but you'll need to validate that info, I'm not sure. The udmx cost around 200$ but if you go with DMX, there's dimmer packs like the CyberPack but DMX-only and they're much cheaper. Anyway, if you buy the CyberPack, you'll be able to use either one.
Also, even more importantly. DMX is much safer and many performance spaces,
will not allow midi dimmers if they are not always attended. This is
because of the dmx signal is lost the lights shut off. Also, I've bought
4-channel dmx dimmers for $100. (They are usually crappy quality - Don't
use for fast blinking of high-wattage lights). Have worked totally reliably
with 300watts per channel. I've had problems with 600 watt fixtures.
Do you have a link to these inexpensive DMX dimmers? I basically want to control three standard clip lights w/ a normal house hold light bulb (60 watt?). Over each one of those clip lights I want a theatre gel; one red, one green, one blue. This way I can create different colors (on a whole) by combing the three behind a case.
That's why the 0-255 of DMX got me so excited, because computers determine color on a 0-255 scale...which I'm sure isn't a coincidence.
Any other advice Christopher? Does this seem doable?