Vidmaster Challenge: Lightswitch is a Halo 3 achievement added in Title Update 2, in which the player must achieve the rank of Lieutenant in any playlist in the TU2 EXP progression system. It was required to receive Recon as the reward for all of the Vidmaster Achievements. The player must gain 50 playlist Exp to reach the rank of playlist Lieutenant. Double EXP weekend playlists such as Grifball are a great way to start earning quick playlist exp. It is represented by a green Marathon symbol, with a Lieutenant rank insignia on it.