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Do you want an extremely visible spot or an extremely visible beam? An extremely visible spot is easily achievable, even in daylight, but you're not going to get an extremely visible beam in daylight for any price.

Flashlight and RC folks use a lot more li-ions than the laser community does. They'll have much more experience with knowing what's decent and what's a potential bomb.

The nightmare scenario with lithium battery fires is that you use up your extinguisher putting out what the battery ignited only to have the (still burning) lithium ignite something new. Lithium batteries aren't bottled death but they are dangerous and should be treated with care. When using...

It's a quantum dot laser. These are quite a bit different from traditional laser diodes and have better thermal stability.

From Biological Effects of Radiowave Transmissions (condensed) :

Lithium batteries are pretty dangerous. Buying cheap junk chargers and batteries is not a good idea specifically because of the fire risk. Burning lithium batteries can't be put out with a fire extinguisher.

Lithium batteries are intrinsically dangerous. Poorly designed li-ions can catch fire or explode with enough force to cause injury. Unprotected batteries will explode or burn if discharged too deeply. Lithium fires are extremely dangerous as they can't be put out with water or with common...

Yep. The tint of a white LED is very sensitive to the amount of yellow phosphor applied to the LED die. Manufacturing variances during production result in different tints along the blue-yellow axis.

What do you mean by this? Do you want something bright enough that someone standing two miles away would see a bright light if the beam was pointed towards them? Or, do you want something bright enough that you can see the spot if you point at something two miles away? What is your specific...

I realize lower powered pointers don't have much of a following here, but does anyone have any good information on how Rayfoss' 10mw compares to NewWish's 10mw pointer? I'm looking for something in the 10mw class to use as an indoor/outdoor pointer. Significant overspec is not a plus (extreme...

Aiming lasers directly into cameras is a really bad idea, especially in public. You could easily destroy your camera's sensor, even with 5mw. More importantly, shining a laser at a complex lens assembly will create unpredictable specular reflections. In other words, a portion of the beam will...

Nah, it's spam advertising.

50mw is unsafe to use--especially indoors--without laser safety goggles. It's more than enough power to cause permanent eye damage from an eye hit from both direct and reflected exposure to the beam. The ILDA has some resources on this. The first is specifically relevant to pointers while the...

Their biggest safety screwup has to be Confederate Rocket, where Savage and Hyneman decided to test a rocket engine by lighting it off inside their own shop. They nearly burned down M5 in the process. My biggest beef with these guys, though, is that the production still uses volunteers for...

In Moon Hoax, Jamie Hyneman casually painted his camera crew with what he stated was a 10mw green pointer. Adam Savage also lit up a camera and its operator with a green pointer in an earlier episode. Laser safety is not one of MB's strong points.

Even with 200mw you're going to have safety and liability issues. Anything over 5mw is potentially hazardous and should not be used in a commercial environment without adequate input from qualified persons with experience in laser safety. You're asking for no end of trouble with liability...

How vulnerable are DVD+R disks to higher powered handheld lasers? DVD+R disks are recorded using a 650nm diode laser, so enough mw of 650 will be able to mess up the recording dye enough to make a burned DVD+R unreadable. The only questions are how many mw, at what range, and for how long, it...

Enough watts of green will be visible in daylight. Unfortunately, this is more than enough power to light fires or blind people instantly if something goes wrong with the beam aim or if something reflective gets into the beam path. Don't even think about trying it without professional help.

Note: this exact SKU is no longer available on FocalPrice. SKU LP022S appears to be identical, however this may not be the case. Buyer beware. On 24 August I ordered a FocalPrice 08EBR24E 5mw 650nm red laser pointer at a price of $4.84 USD. Shipping from Hong Kong to my location took...

Best-case spot quality, when pointer is held at exactly the right angle: Medium-case spot quality, when pointer is held upright: Worst-case spot quality, when pointer is used with button pointing to the left: Beam visibility in low light: Note beam spill on the left.