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Re:How the Freightliner Reveal Was Projected onto the Hoover... by stephengillie on Thursday May 07, 2015 @01:23PM (#9506709)
For the Grand Coulee Dam's laser light show, they use 4 large frame Coherent Sabre Lasers - 2 red 12-watt Krypton lasers, and blue and green 30-watt argon lasers. That would probably be too complex to set up for this one publicity stunt.

http://en.wikipedia.org/wiki/Laser_light_show_%28Grand_Coule...

Re:How the Freightliner Reveal Was Projected onto the Hoover... by telmnstr on Thursday May 07, 2015 @06:44PM (#9508882)
Companies like Image Engineering out of Baltimore have 50 watt solid state laser projectors that can run on fairly nimble power sources without water cooling like the Sabres and other large frame ion lasers.

Laser projectors are good for beam effects and vector art but won't be able to touch Christie and Barco projectors if one managed to scan a raster image with them. (Yes, some Christie and other projectors use lasers an an illumination source but it's much different.)