You need a spectrometer
Played this last night with a relatively busy server. It was quite fun, though many were confused about a few things.
A few points:
-The size makes gameplay seem slow.
-The deadly floor puzzled a few players. I don't mind that, myself.
-The tunnel under the lab counter should probably be more prominent, or have better items in it to make it a compelling avenue of travel. As it stands, it's relatively useless, save maybe to cover yourself from sniper fire.
-Too many trigger_hurts. Standing on large shard of glass shouldn't automatically hurt you, and it's a bit aggravating to get burnt by the bunson burner when you grab the quad

Though that's what burners do, I suppose
I really like the map though. I agree that it's largely dark and colorless, but as you said -- this is a first version. Can't wait to see what you do next.
Cheers!