W100

[Packhorse]

Check out the new Ultrafire W100.

Takes a single 18650.

 

[gcbryan]

I would fall for that and ask you where you got it but being Packhorse I'm sure it's an in house creation!

Looks nice. I wish DX did have such a thing.

 

[Packhorse]

Indeed.

Im looking at a 700ma AMC 7135 driver and XR-E aspheric.
Should be good for 3 hours at a high output and a few more in "gauge mode".

 

[gcbryan]

I think you should put a XP-G in it with some kind of TIR optic.

 

[Packhorse]

I already have one in a W200.

Prefer to have a aspheric as well.

 

[Packhorse]

Well I finished this one.
I went with a R2 XR-E, Ahorton aspheric lens and a 3x AMC 7135 driver.
I was supposed to be a 2 mode 100% and 10% driver but turns out to have a slow stobe too. Sucks big time.
On the bright side I really like the size and the combo of Li Ion XR-E and AMC driver makes it a very efficient light. It also means it will dim down at the end of the charge instead of shutting off.

 

[gcbryan]

Well I finished this one.
I went with a R2 XR-E, Ahorton aspheric lens and a 3x AMC 7135 driver.
I was supposed to be a 2 mode 100% and 10% driver but turns out to have a slow stobe too. Sucks big time.
On the bright side I really like the size and the combo of Li Ion XR-E and AMC driver makes it a very efficient light. It also means it will dim down at the end of the charge instead of shutting off.

That's a nice size. If the cells are protected it will still just shut off at a certain point...right?

I think an XP-G driven at 1.5 A would be interesting. That's starting to get in to primary light output if used with a constant current driver with 100% and 50% modes to extend time if needed. You could do a long dive on that before recharging. The small size would allow for hands free mounting.

It's a nice looking light in any event.

Do the XP-G's not do well with aspherics? I know there is less benefit over a reflector as far as efficiency but a reflector has spill and an aspheric doesn't so if you didn't want spill but did want a bigger hotspot than a XR-E provides could you use an aspheric with an XP-G?

 

[Packhorse]

That's a nice size. If the cells are protected it will still just shut off at a certain point...right?

Yes. But it will dim down first and give you plenty of warning. 30 min minimum but probably 1 hour +

I think an XP-G driven at 1.5 A would be interesting. That's starting to get in to primary light output if used with a constant current driver with 100% and 50% modes to extend time if needed. You could do a long dive on that before recharging. The small size would allow for hands free mounting.

For sure.
I already have a W200 like that but its full size. Using a short body and 1 18650 would reduce its run time too much.

Do the XP-G's not do well with aspherics? I know there is less benefit over a reflector as far as efficiency but a reflector has spill and an aspheric doesn't so if you didn't want spill but did want a bigger hotspot than a XR-E provides could you use an aspheric with an XP-G?

Due to the wider angle of light dispersion of a XP-G (125deg ve XR-E of 90deg) most of the extra lumen ( if not all and then some) is lost before it hits the aspheric.

What would be interesting to test is a de domed XP-G.

 

[gcbryan]

...
Due to the wider angle of light dispersion of a XP-G (125deg ve XR-E of 90deg) most of the extra lumen ( if not all and then some) is lost before it hits the aspheric.

What would be interesting to test is a de domed XP-G.

How is the light lost in a sealed cylinder? I guess for the aspheric to work the light has to be coming from a single point (emitter) rather than just the ambient light in that sealed cylinder.

 

[Packhorse]

How is the light lost in a sealed cylinder?

The inside of the light is black.

Go shine a light against a black object and then shine it against a white object and observe the difference in reflected light.

Now even if the inside was white instead the light is going to bounce around inside quite a bit before it will exiting through the lens and each time it hits a surface it will loose some strength. When it does finally exit it will be out of focus and contribute to the spill light.