what rating are the lasers?

Before I retired I worked in the HE Sector and regularly had requests from the Students Union for Laser Displays in their dance hall These requests were always refused unless they were able to demonstrate they could comply with HSG 95. On one occasion we discovered that the calculations which had been made by the display company were incorrect and could have put the audience at risk had the show gone ahead. The other consideration is that the natural blink reaction is decayed when alcohol is consumed.

Hello there I would ask for some further information from the Company putting on the laser show, in particular ask about how much experience they have in lasers. They should be able to provide you with some measurements they have taken and a safety plan which gives details of the different systems being used including the laser classification, the approximate distance from the audience, the wave length mesured in nm and verification of light measurements in mW. The key with laser safety is making sure that the system is safely programmed so that the beam of light is always projected above the audience heads. If the Company cannot provide you with this sort of detail I would be very wary about their competence. It is a crazy situation but you can "dry hire" lasers without a trained operator, which is something best avoided.