OTF
Coney Island Whitefish Biologist
Nanight Sport 2. $350. 4000 lumen. Swappable optics. High quality made in Sweden by a small company with great customer service.
Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.
Benefits of registering include
The first part, I don't remove the soft goodman from my dryglove, it is always on there unless I am using a canister light.Are you all mounting this on your left hand and using the QRM when you need to switch hands? Or are you sliding off the soft glove?
you do at least turn it off then when you're reeling lines in yes? When cave diving you will get all sorts of excitement and angst from other cave divers if you don't. I've come flying into the cavern area several times seeing lights dancing around like that because it mimics an emergency signal.Mine went on the right hand and stayed there. I don’t switch hands.
Nanight Sport 2. $350. 4000 lumen. Swappable optics. High quality made in Sweden by a small company with great customer service.
It's not putting out 4000 lumens at the emitter. The emitter is capable of putting out 4000 lumens, but it's not being fed enough current to do it. The values that I calculated above are at the emitter. There will be efficiency losses through the optics, especially since the different lenses that it comes with while convenient are inherently quite inefficient. I would hazard a guess that it would compare very close to the Dive Rite HP50 at 2500 lumen.I've been using a Tech2 for almost 2 years. No complaints. Specially since it was cheaper back when I bought it. I noticed several places quit carrying Nanight stuff, I'd be curious to know why.
Nanight states that their 4000 is *emitter* lumens. Disingenuous? Maybe, but at least they put the word emitter. I very rarely run it higher than setting 2, so lumens has never been an issue for me. It has lenses, and lenses are detrimental to any light efficiency. But at the same time it's nice to be able to take the lense out and instantly have a video light.
The original charge port sucked, but the new one is trouble free. I made my own 4s2p battery packs.
@boriss
Third party testing of the LX20. They have not done the LX20+ but there is no reason to believe that they changed to where you would question their claims.
We Test Lights | LX20 Test and Review
wetestlights.com
Nanight
3350mah battery at 14.4v=48.24wh
History says that the burn time claims from the manufacturers are pretty accurate because that is what the customers can measure.
48.24wh/2hrs=24.12watts average consumption with an "ideal" efficacy of 136 lumen/watt. 24.12*136=3280 lumen at best. Reality says the batteries should have a cutoff and there are other efficiency losses that are at best around 80% so call it 2600lumens. Either of those numbers are a far cry from the claimed 4000 lumen.
It is going to be more comparable to the Dive Rite HP50 which is a great light, but it's beam is too wide at 10* for my use in most caves, but more especially when diving during the day where the wide lights really don't do much and you need the narrower hotspot to actually see anything from any distance.
Is it a good light, yeah probably, but the lumen claims are a bit optimistic so don't try to compare it to a true 4000 lumen light
Thanks, I'm not questioning the Dive Rite lights. Thinking the LX20+ might become my primary.
I'm not yet sure which features I need though, as far as beam angle. I don't do caves and my current wreck penetrations haven't lasted more than 30-minutes.
My tech instructors (ab)use BigBlue and those have a 10degree beam angle. Yes, I'm aware that they don't live up to stated claims and aren't constant burn.