Will it hurt my Macbook Air to be plugged into a "Uni Pak II" which is a dimming power source? I'm at a conference and the only plug is a "Uni Pak II" which is a dimming power source (here's the manual).

At first my charging indicator on the end of the MBA plug didn't light, but I slid up the analog slider and it lit up (I knew it had worked yesterday!).

Is there any chance of it harming my MBA or power supply to use this?
In general, it isn't a good idea to put a power adapter on a light dimmer as the circuitry could malfunction if the voltage is too low.

That being said, I believe the 45W adapter for the MacBook Air will survive- it just won't charge if the dimmer reduces the voltage below 100 volts. The AC is converted into DC and then applied to a voltage regulator circuit which typically shuts down when it isn't getting enough.