Set Lasers for Fun

 is a perk in Fallout: New Vegas.

Effects
You're laser-crazy and it shows! Minor bonus to critically hit with all laser weapons.

You obtain this perk by getting 64 critical hits with any laser weapon (Laser Rifle, AER 14 Prototype, Laser RCW, etc.). Note that this perk only has one rank, even though you can repeat the Laser Critical challenge.

Behind the scenes
The name is a reference to the Star Trek line, "Set phasers to stun."