Resoure from: http://mountainglenharps.com/laser-harps/

Laser Harps Overview
For playing on stage as a midi performance instrument, your Laser Harp can be custom designed to fit your needs. Mountain Glen Harps can create your laser harp in just the size and configuration that you desire, with from 6 to 64 laser beams. Using the world’s fastest, most sophisticated midi controller and custom Windows software, we can can design, create and install a vibrant, brilliantly lit Laser Beam Harp, with from 6 to 64 red, green, and /or blue lasers in your museum or other public venue.
I can also build you a solid body or fully acoustic harp with strings that is also stereo electro-acoustic. This type of laser harp uses individual string transducers, including installed fully midi-multimedia lasers. If there is to be no public interaction with your Stage Performance Laser Harp, then higher powered, but still safe lasers can be used for a brighter stage presence. See more about laser harps for stage performances HERE!
Laser Harps for Public Interaction
For public Interaction Multimedia Laser Harps, using USA-FDA/EU lasers approved for public interaction, we use low powered blue, red and/or green lasers, using low powered <1mw (EU regulation), or <5mw lasers (USA-FDA regulation). These lasers are approved as safe for public interaction when installed in a public accessible laser harp. Other color choices are available at extra cost.
We can create laser harps for installation in your Science and Technology Center, Children’s Museum, Children’s Hospital, Exhibit Hall, or Entertainment Center. Using the world’s fastest, most sophisticated midi controller and custom Windows software, we can can design, create and install a vibrant, brilliantly lit Laser Beam Harp, with from 6 to 64 red, green, and /or blue lasers in your Public Venue.
For your Science Museum, Children’s Museum, or Entertainment Center, I can design a compact lap or floor-sized laser harp that looks just like a harp. Or I can design a laser harp installation in a shape that is very sculptural and streamlined. For example, a harp designed in a large open “C” shape, or any other shape that you have in mind. For a entirely different approach, your Laser Harp installation could be in the shape of a grand old Oak tree, carved from figured Maple or Myrtle wood, with the lasers shining down from the branches onto sensors in the exposed tree roots! See more details about laser harps for Science and Children’s Museums HERE.
Let me know all your ideas and design requirements. I look forward to bringing your special Laser Harp project to life, for all your educational, entertainment or stage performance needs!
Please also see my Laser Harps Facebook Page: Laser Harps On Facebook