Solver 95 Report post Posted January 5, 2018 Hail fellow nerds ang geeks whos nerdiness and geekiness is far greater then mine. I need your help. I recently watched a fun video where Mark Rober makes fun pictures with kids and a glow in the dark wall. As i am a scout and youth leader, i thought that would be fun to do with the kids. For the most part that is pretty easy. In the video he uses laser pointers (blue) as pens that the kids finds realy fun to paint with. Since i will be using the standard greenish glow in the dark paint, i need a blue laserpointer for that. An as swedens laws regarding those are quite strict i can only use a <1mw laser without a permit. Will the <1mw laser be enough to excite the electrons enough? And where can i buy one, preferebly in sweden since importing laser pointer needs a permit. Share this post Link to post Share on other sites
Xenu 197 Report post Posted January 6, 2018 15 hours ago, Solver said: Will the <1mw laser be enough to excite the electrons enough? And where can i buy one, preferebly in sweden since importing laser pointer needs a permit. I dont know about the rest, but about this: You can't - it is illegal. Oh, I thought MEGAWATT laser but I think you mean milliwatt. It think that everything under 1mw is legal Share this post Link to post Share on other sites
Solver 95 Report post Posted January 6, 2018 With one megawatt i'm pretty sure i need a truckload of condensators and another truck to transport the thing. :-) Class 1 and 2 is perfectly legal (below one milliwatt). Class 3R is legal with a permit. 1 Share this post Link to post Share on other sites
alle090 76 Report post Posted February 13, 2018 (edited) I want a MegaWatt laser.... Please, I need this... for my work! Joke aside, the only types of laser you are going to find in Sweden (for a reasonable price) are only weaker red-point laser which often barely makes anything more than a weak red dot on the wall. BUT, if you are talking about this video below, I would suggest you could try using handheld UV lights, which you are allowed to import with a stronger wattage. UV light works allot better than regular flashlights, but not as good as a strong laser pointer. You can see him using UV lamps @ 6:06 Edited February 13, 2018 by alle090 1 Share this post Link to post Share on other sites
Solver 95 Report post Posted February 13, 2018 (edited) that is the video i was refering to. Uv lights i got. I wanted a realy sharp small point to use as a pen, thats why the lazer. I have found the excact pointer i need, but it costs 1200Sek. Also found a company that sells them for around 40-100Sek a piece, but you need to order a minimum of 1000 There is ofcourse the sollution of using a lasermodule powered by the grid, they are legal at very high watt. But also very inpractical. If it was just for me, i would just order a stronger one and ignore the law, but since i want to use it in my work with youth, i want to be on the right side of the law. Edited February 13, 2018 by Solver 1 Share this post Link to post Share on other sites
alle090 76 Report post Posted February 13, 2018 Well, you could always focus a UV light to a small spot. But that takes some tinkering sometimes depending on the design of the light. Also, UV light are safer for the youth. Regarding most companies, you can get a test batch of 10 or so (instead of 1000). Not sure if they need to verify if you have a Certificate or not. Why not apply for a certificate? Its mostly there for you to sign that you will not do anything illegal with it. Using it for educational purposes should be ok. Share this post Link to post Share on other sites
Solver 95 Report post Posted February 13, 2018 It's pretty expensive to get a permit, and the youth center i have in mind is operated almost entirely on donations and dosn't realy have that money. But i have been thinking of getting the permits myself. 1 Share this post Link to post Share on other sites
