http://citycyclingedinburgh.info/bbpress/ CityCyclingEdinburgh Forum » Topic: 'free' laserlights en Sat, 18 Apr 2026 06:44:52 +0000 http://citycyclingedinburgh.info/bbpress/topic.php?id=15664#post-202608 Fri, 23 Oct 2015 15:23:13 +0000 neddie 202608@http://citycyclingedinburgh.info/bbpress/ <p>See the "Eye injury" section of:<br /> <a href="https://en.wikipedia.org/wiki/Laser_pointer" rel="nofollow">https://en.wikipedia.org/wiki/Laser_pointer</a></p> <p><em>Laser pointers available for purchase online can be capable of significantly higher power output than the pointers typically available in stores. Dubbed "Burning Lasers", these are designed to burn through light plastics and paper, and can have very similar external appearances to their low-power counterparts</em></p> <p><em>The UK Health Protection Agency warns against the higher-power typically green laser pointers available over the Internet, with power output of up to a few hundred milliwatts, as "extremely dangerous and not suitable for sale to the public."</em></p> <p>Note the start of the article deeming laser pointers as "mostly safe" is misleading (likely just out of date due to new higher powered lasers becoming available). </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=15664#post-202607 Fri, 23 Oct 2015 14:48:04 +0000 neddie 202607@http://citycyclingedinburgh.info/bbpress/ <p>Please be careful with cheap lasers from China.</p> <p><strong>Many many of the laser pointers that come out of China are <em>way way</em> above eye-safe levels.</strong></p> <p>For example class 2 (eye safe) max power is 1mW, yet some laser pointers measure at 150mW!</p> <p>Also, the eye naturally moves to centre on a bright light or moving object, thus burning the central Fovea. The Fovea is the "high resolution" part of the eye - without it, you will only see bright &amp; dark areas!!!</p> <p>Less than 1 second exposure is enough to create a burn. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=15664#post-202605 Fri, 23 Oct 2015 14:29:07 +0000 sweb67 202605@http://citycyclingedinburgh.info/bbpress/ <p>Hi,</p> <p>I have one of these they work very well. Its was 99p including post and packing on ebay from China. It also has a standard light output but for some reason this is blue so cant be used. The lazer output is excellent. </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=15664#post-202602 Fri, 23 Oct 2015 14:15:55 +0000 chdot 202602@http://citycyclingedinburgh.info/bbpress/ <p>"</p> <p>Note : Do not look directly at laser lights!</p> <p>"</p> <p>Perhaps not a great idea... </p> http://citycyclingedinburgh.info/bbpress/topic.php?id=15664#post-202601 Fri, 23 Oct 2015 14:02:04 +0000 SRD 202601@http://citycyclingedinburgh.info/bbpress/ <p>so this turned up in my FB feed - USD 9.95 shipping only to pay for one of those lights that shows two red 'laser' tracks behind you. </p> <p><a href="http://fansdepot.us/laserlight" rel="nofollow">http://fansdepot.us/laserlight</a></p> <p>major weakness that I can see in description is that 2 AA batteries only give 9 hours run time, which is pretty poor. </p>