If you want 532nm modules that are very likely to have strong output the answer is simple if they will ship to you. Fasttech.
Specifically the 3V or 5V ones for about $6 each. Their description says 5mW but this is beyond wrong. I've purchased over a 100 of them since joining and have only received one dud that I can remember. In general you can expect the drivers pot to be set to from .2 to .3 amps and the outputs to be 50mW+.
However, if you have the tools/meters to adjust the pots to .43A which I have found to give the most output on average they can go much higher. The last 3 5V ones I purchased about a month ago were all between 120-130mW at that setting which is a VERY bright beam. Most come bright enough already and I would certainly expect the life expectancy to drop with that kind of setting increase.
Of note I would personally buy the 5V ones. Why? Because the only difference between them and the 3V ones is that the 5V drivers can handle up to a 5V input which gives you the ability to run it on just a couple of AAA or a single 10440 or any other fully charged 4.2V battery.
I don't know why I have to continually explain this over and over but people just can't seem to grasp what I mean.
Both the 3V one and the 5V one will start outputting at the same voltage in. In other words you would normally use 2 AAA batteries with the 3V one for full output and it's the same with the 5V rated one. Anything over that and the 5V ones driver just takes that extra voltage and wastes it getting rid of it as heat and does not give the voltage to the diode. So, you just get the 5V one so you have more battery choices you can use with it.
There is however a length difference between them. The 3V one is a bit shorter. I believe they give the dimensions. Either one will fir I to a standard 12mm holed heat-sink. Just put the last 2 5V ones over 100mW in hosts a couple days ago
I read about people buying modules all over the place that they pay way to much for and it kills me. In general if you are looking to buy a module and see an ad from any of the zillion places out there that are not listed here as serious companies disregard any claims they make on their modules output and spend that same amount of cash on as many Fasttech ones as you can and be prepared to be shocked at what you get for the $.
For an extra treat, buy the little white 532nm laser that only takes a single AAA that costs about $10. Almost every e I've ever bought gives a nice bright beautiful beam and even comes with a removable star cap. These also have a pot that can be adjusted if you take it apart
Am I missing something with the set up or is it just a dud? Reading through lazerer reviews here makes me think it was a bad idea to buy from them... should have searched it before buying...
