GUE position on lights

[PfcAJ]

Understood about the grappling hook. What I'm trying to get as from a brightness/burn time point of view, would you use this light in a cave? So let's say you are at some cave, about to go on a dive. Somehow, when you test your normal primary, it is dead for whatever reason. Someone hands you a fully charged Focus 2.0 modified with a Goodman handle. What I'm trying to find out is, if you as a cave diver (which I am not at this point), think that the capabilities of the Focus 2.0 are good enough. I don't own one, but I may consider it in the future (or something similar in capability).

Yeah I think it's good enough.

You could do way worse and still be good enough.

 

[_Ralph]

As mentioned briefly before, nothing says you have to use a canister as your primary light ....

Instructors teaching a course would look for a corded primary light so that they can teach you, and be sure you can deal with the added complexity of dealing with the cord during the dive (stowing the cable under the long hose and belt, and deploying the long hose without turning into a cluster).

As for a "GUE" dive .... as long as there is enough burn time for the dive you have planned (just as everything else, have enough breathing Gas? Enough scooter burn time? Enough xyz for zyx?).


As for the Alkaline only statement with backup lights, it is regarding rechargeable (NiMh and LiXYZ) in general (of yesterday years). When is the last time you charged it? Have you metered it? If you are diving lots, generally it may stay on the harness for quite a while before any thought about the battery comes to mind before it needs to be used .. unlike a canister, scooter, camera, etc

The "shelf life" of an Alkaline is longer. So, when in doubt? Throw in a fresh new one.


Just some thoughts as a GUE diver (NOT instructor or mucky muck)


_R

 

[_Ralph]

As for the 2.0 .... Hot Damn! that is one impressive light (even with the "improper" square ... or in my case, diamond pattern at narrow).

I used to use a 21w HID and an 18w HID before that, and this blows it way out of the shallow sand in bright daylight. Most of the other people I dive with have the Flare or Focus, and it's still no competition for the 2.0

_R

 

[PfcAJ]

so what is the reasoning behind not allowing li ions for backup lights? I am curious

I find lithiums to be relatively finicky compared to like a Duracell alkaline. Self discharge, gotta remember to charge them, maintain a charger, perhaps a bit temperature sensitive, cost.

Alkalines I can use and abuse.

 

[PfcAJ]

As for the 2.0 .... Hot Damn! that is one impressive light (even with the improper square ... or in my case, diamond pattern at narrow).

I used to use a 21w HID and an 18w HID before that, and this blows it way out of the shallow sand in bright daylight. Most of the other people I dive with have the Flare or Focus, and it's still no competition for the 2.0

_R

It's serious business. I love it.

There are only a few pieces of gear that I think approach perfect and the 2.0 is getting close.

 

[KevinNM]

As for the Alkaline only statement with backup lights, it is regarding rechargeable (NiMh and LiXYZ) in general (of yesterday years). When is the last time you charged it? Have you metered it? If you are diving lots, generally it may stay on the harness for quite a while before any thought about the battery comes to mind before it needs to be used .. unlike a canister, scooter, camera, etc

In my cavern course Jon Bernot mentioned that he knew a pair of rebreather divers that swam back 10,000 feet in the dark after all their backup lights failed to work due to lack of testing. [Didn't mention names] Probably not the most fun dive of their career.

 

[_Ralph]

In my cavern course Jon Bernot mentioned that he knew a pair of rebreather divers that swam back 10,000 feet in the dark after all their backup lights failed to work due to lack of testing. [Didn't mention names] Probably not the most fun dive of their career.

Speaking of which ... "coincidentally" I'm going to charge mine up now .... (last charge was 2 weeks ago before this last trip I just came back from )


_R

 

[runsongas]

meh, i'll stick to li ions and just topping them off when i charge my primary

 

[PfcAJ]

meh, i'll stick to li ions and just topping them off when i charge my primary

Burn testing those regularly?

 

[WantSomeScuba?]

It's serious business. I love it.

There are only a few pieces of gear that I think approach perfect and the 2.0 is getting close.

Ehhh, I just got one two weeks ago, and the anodizing on the body is pretty easy to scratch. I'm thinking I made the wrong choice here...