Revision as of 22:36, 28 April 2011 by Msleeper(talk | contribs)(Adding link back to the main Portal 2 Level Creation portal page, and a few minor nit-picks (to make the article consistent with Portal 1 articles))
Vacuum tubes are an aesthetic element of Portal 2. They are used throughout Aperture to distribute objects, like cubes, turrets, and gel. They can be used to add visual interest to levels, and should be used around droppers.