So yesterday I went to a small party at a small venue somewhere in Belgium. I took my 300 mW green laser with me along with some other lights. The venue was nice, not very large but we weren't expecting a lot of people (about 100 maximum). The ceilings were nice and high (I estimate around 5 m). There were some bars at the ceiling and one of them was a perfect spot for the laser and after a lot of effort on scaffolding, the laser and cables were in place. There was a bit of concrete directly behind the bar preventing the laser from unexpectedly tilting down. The bar looks sturdy enough to hold a few grown men, and I used a TÜV-approved Doughty clamp. I was pretty sure nothing could ever go wrong with this setup. Even if it did go wrong, the scanners are 30 kpps, the beam is "only" 300 mW and has a pretty high divergence.
Then the venue manager looks at what we're doing and asks if that big scary box is a laser. He gets a bit nervous but allows the laser to stay in place if I sign a waiver of liability (or whatever the correct juridical term is) where I take responsability for possible eye damage due to laser radiation. No problem for me, the lowest the beams could go were about 3 m above ground level and I planned on staying near the laptop while the laser is running. The public were mostly composed of friends and in the many times I did a similar party for the same audience, nobody ever used a laser pointer. I'm sure if somebody did, I could ask them not to. The crowd weren't ravers or punters or whatever the term is but rather chilled out hippies.
Then comes the venue lighting guy. He asks how much mW the laser is. I say about 300. Then he claims lasers above 300 mW need an interlock by law (which -mea culpa- I don't have. Usually I solve this problem by setting up the laser in such a way I simply don't need an interlock). My jaw dropped. I have never heard about laser show safety laws in Belgium, despite a search. As far as I know, I wasn't violating any European laws with the setup at the venue (the laser beam could never reach the audience). Now I have to admit my knowledge about laws is lacking. I believe there is a law concering radiation and employees.
The light guy told me he got most of his information from the Phoenix manual. We talked about this topic a bit, but sadly they won and we had to take the laser down![]()
The rest of the night was spent with boring non-coherent lights.
Now I'm left with a lot of questions.
- Where is that law that states you need an interlock above 300 mW? Why 300 mW? I have never heard of such a limit.
- What is the regulation in Europe and specifically Belgium? I was told Belgium simply copies the regulations of other countries. I'm really bad with legal stuff so I'm clueless as to where even begin searching.
- Does anybody have a copy of the Phoenix manual with the laser safety regulations? Apparently only the German edition has it.
- Does the European law about protecting employees from harmful radiation apply when the employees are volunteers?
- Does the law apply when the party is invite-only? What if the party asks money for income and drinks (but is still invite-only) without the intention of making a profit?
- How about projecting in the sky? Obviously projecting at airplanes is out of the question. But is there any regulation regarding laser shows near airports? Do you need to request such shows? Where do you request them?
- Are there any laws about audience scanning? What is allowed? What isn't? What are the requirements for the projector?
The PL safety wiki is a bit lacking. There are entries for the UK and the Netherlands. None for Belgium or Europe in general. Any pointers?