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While the lasers themselves can cause injuries, laser light shows that are produced in ance with FDA regulations keep hazardous lasers away from the audience. For shows where the laser beam could fall on the crowd, the power of the laser is kept below levels know to be hazardous.

A DJ laser is consider a safe Class 3R laser with restricted beam exposure. Like with any other beam of light, DJ lasers are safe as long as you avoid direct long exposure. Similar to disco or DJ lights, laser lights can cause flash blindness with direct contact.

DPSS lasers used a very high powered infrared light source, which was then focused onto a specific crystal (Nd:Yag) to create various lasers wavelengths (colors). Most recently, diode laser technology has become the standard for laser show laser modules.

Lasers with 5,000mW and up are used at large in- and outdoor events, festivals, concerts etc.

But the agency is concerned about the misuse of these potentially dangerous devices and their increased availability for purchase on the Internet. Laser pointers are misused when they are directed at people or treated as toys.

NEVER put yourself into any position where your eyes approach the axis of a laser beam (even with eye protection on). Keep beam paths below or above standing or siting eye level. Do not direct them towards other people. Do not damage laser protective housings, or defeat the interlocks on these housings.

Under condition 13(a) of the variance application, beams must be kept at least 2.5 meters laterally and 3.0 meters vertically from audience access. This means laser beams should be kept approximately 10 feet above any surface upon which someone can stand, and approximately 8 feet in lateral separation.

Lasers work by shooting a really tight beam of light through some fancy mirrors and out the front. Lasers for stage lighting generally have mirrors that allow you to move the beam of the laser around to make shapes in the air and on surfaces that you aim the laser at.