LED or Maglite

[NZcaver]

Here's a follow-up on that 1 watt Luxeon bulb that was discussed earlier... (for the Petzl Duo high beam)



http://store.led-replacement.com/ls407.html (These sell for $24 incl shipping.)

Non-scientific results from a few weeks of lava tube caving recently - great!

With fresh batteries, the side-emitting LED is approximately the same brightness as the halogen bulb it replaced - but with that nice clean white light. And it can still be manually focussed, just like the halogen. But the LED really starts paying for itself once you get some hours of use on the batteries, particularly if you use NiMHs like I do. Although I'm still happy using the 8 LED low beam 95% of the time, it's nice to actually have a usable high beam for spotting when you're 10 hours or more into a cave.

Verdict - 2 thumbs up!

[cavemann]

where do you get the IMO conversions for the mag lites ?

[Cheryl Jones]

where do you get the IMO conversions for the mag lites ?

From IMO -- InnerMountain Outfitters http://www.caves.org/imo/

[erebus]

I had a big flashlight that I really liked, which I bought at BJ's Wholesale. It was the size of a 4-cell Maglight, machined aluminum, and it had an array of LEDs around the reflector, with a halogen bulb in the center. The pushbutton switch cycled between Off, LEDs on, and halogen on. Sadly, I put the Chinese batteries that came with it in, and they leaked acid all over the inside and ruined the circuitry. Haven't found another one, or I'd buy it.

Don't use those Chinese batteries.

[Steven Johnson]

Here's a follow-up on that 1 watt Luxeon bulb that was discussed earlier... (for the Petzl Duo high beam)

Hmm.... wonder if they make one that would work in 3-cell systems?

I have an old Petzl Zoom that would greatly benefit from something like this...

[NZcaver]

Hmm.... wonder if they make one that would work in 3-cell systems?

I have an old Petzl Zoom that would greatly benefit from something like this...

Yep, they do - the LS365 http://store.led-replacement.com/ls365.html

They also make a bunch of other retro-fits including a 2-cell version, the LS233 http://store.led-replacement.com/ls233.html

I used to have that old model of Zoom too, but gave it away at a grotto Christmas gift swap. I also have a 3-cell Mega Zoom laying around somewhere. Not bad lights, but they're blown away by some of the latest toys - like the Princeton Tec Apex. That one I REALLY like...

[paoconnell]

Why not have a MiniMag with LEDs?

The local WalMart sells a NiteIze "LED Upgrade" for a MiniMag that replaces the bulb and reflector with an array of three white LEDs and a reflector that fits around them. Only minus point is that you lose the variable beam feature, though you can still use the MiniMag as a tent (or cave) "candle." The upgrade costs $5.00 or so. I'm sure that some of the cave equipment suppliers sell this kit also, and I've seen NiteIze stuff at Fry's out in the far west.

The only trick to the install is that LEDs are diodes , so you might have to remove the array from the flashlight then rotate and re-insert it to get the light to work. Instructions are on the card the adapter comes in.

[speloman]

Yes those NiteIze are great. I have on on my Mini Mag that is mounted on my helemet. Though true you loose your focus it gives off a very exceptional light. I crawled thru a sqeeze and my Main lamp came unpluged when the cord got snagged and I just reached up and turn on my minni mag and it worked GREAT. $5.00 too very good light for the price.

[potholer]

Running an LED at 3W as a straight bulb replacement in a plastic headset like the Duo might end up with problems getting rid of the heat, and even if that issue was sorted out, it would also either need some variable-power electronics to contol it (which woudln't likely fit in a bulb base), or become a power-guzzler in its own right.
Without fancy electronics, 3W equates to roughly an amp through the LED (*and* an amp drawn from the batteries), which would make the main beam really only useful for brief spotting, giving ~2hours runtime on NiMH AAs.

At a 1W (~1/3Amp) power draw, the main beam would be usable for a sensible amount of time (6hrs+?) as a light to cave on in areas where the 8-LED array isn't at its best, like low contrast uneven floors, where a bright spot can make undulations much more visible.

[hewhocaves]

Why not have a MiniMag with LEDs?

The local WalMart sells a NiteIze "LED Upgrade" for a MiniMag that replaces the bulb and reflector with an array of three white LEDs and a reflector that fits around them. Only minus point is that you lose the variable beam feature, though you can still use the MiniMag as a tent (or cave) "candle." The upgrade costs $5.00 or so. I'm sure that some of the cave equipment suppliers sell this kit also, and I've seen NiteIze stuff at Fry's out in the far west.

The only trick to the install is that LEDs are diodes , so you might have to remove the array from the flashlight then rotate and re-insert it to get the light to work. Instructions are on the card the adapter comes in.

One of these wound up being my primary light source in Norman Cave in WV when my carbide tip got jammed and I couldn't get the tip out in-cave (Doh!). Norman is a dark cave with lots of water and mud. Passage dimensions average about 20'.

Two of these strapped to your helmet would do a good job in a small to mid sized cave. Granted, you're paying almost double (ten bucks for the minimag and eight for the adapter) and for $40- you can shop around for other lights. But a lot of us already have minimags.

Lastly, they made great grotto grab bag gifts last Christmas!

john

[Hatch]

Norman is a dark cave with lots of water and mud. Passage dimensions average about 20'.

So, just out of curiousity, how many caves have you been to that weren't dark?

Hatch

[cheshire]

So, just out of curiousity, how many caves have you been to that weren't dark?

Hatch

It's scary, but I've been to quite a few. I took a couple of trips in some small caves in Kansas. Mostly it was the talus caves, and a few gypsum ones on another trip. It was a blast, but there were quite a few times when you didn't need a headlamp.