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Hello photon specialists, I've been a bit behind on the present variety of LED beam throwers, and have an important use: trespassers in a rural area. I have a relative who lives mostly alone, and she needs a good solid, focusable and temporarily blinding LED with a few modes. Keep in mind, they...

Neutrino breaks light speed... According to experimenters at CERN in Geneva, where neutrinos were sent underground to Italy , a 454-mile journey. The article is longer than it needs to be compared to info it has, so I'll provide background that I know and bits from the article; I'm not reading...

So , how many have been cheated on in a relationship they put their heart into? I guess for me, out of the 5 more serious relationships, 3 involved cheating. In some of the cases I can see things weren't going great, but in at least one, it was very uncalled for, unexpected. Maybe girls get...

I ordered 7 from HK a while back, finally got them today. Had to set aside 2 of them, (one dead and one dims too fast) but the others tested out good. I will include (cheap) batteries. They were tested with both energizer and the cheap batteries. They work but probably only a few minutes or...

Curiosity got the best of me and I put 2 3.6V AAAs into one of the overspec pens I got off of swimsurfer. "A bulb that burns twice as bright only burns half as long"- Bladerunner. I looked into the pen and saw a red dot glowing in there... oops. So something is still working. Let the bidding...

This laser took about a month to arrive and cost about 26$. In my opinion, it was worth it. I'm not writing this review to benefit in any way, and it is unbiased. I will add pictures if requested. It's worth clicking the link just to see the pic they added aiming the laser at a football player's...

I've studied light extensively, in college physics some but more on my own as a hobby. The more I've studied, the more questions arise. I have a cousin who majored in physics; I asked one of these questions to, and he couldn't answer it (although cleverly dodged it). Some may be considered...

I've searched the question, and came across a color chart which shows the typical 400nm-700nm visible surrounded by gray for a few 10s of nm on each side. I'd imagine there is individual variability, and this is what I'm curious about. Can any of you see beyond this spectrum? Is it typical? I...

Hello, I'm new with lasers and electronics, so go easy on me. I bought a Survival Laser off Gary and it came today. I put it together in ten minutes, making sure everything was correct (and taking notice of instructions to be careful with diode wires/assembly). Brief review of the fun The...

My price range is capped at around 80$ (which I'd like to be for a 200mW). I don't care much about looks but want it to be in a handheld casing. It has to be an actual 100mW+, not just what the manufacturer says, but tested by a member here (or same models tested at least twice). My main use...

Hello. I joined a week or so ago after reading some very informative, intelligent posts from some here. I've been in contact with Garoq since and it seems I'll be getting that survival laser. My experience with lasers has been fairly wide; I've owned them since I was 14, when I got in big...